/usr/bin/java -Xmx16000000000 -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/popl20-more/array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:36:21,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:36:21,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:36:21,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:36:21,478 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 [2021-06-05 23:36:21,512 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:36:21,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:36:21,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:36:21,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:36:21,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:36:21,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:36:21,516 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:36:21,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:36:21,516 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:36:21,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:36:21,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:36:21,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:36:21,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:36:21,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:36:21,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:36:21,518 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:36:21,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:36:21,518 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:36:21,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:36:21,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:36:21,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:36:21,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:36:21,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:36:21,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:36:21,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:36:21,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:36:21,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:36:21,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:36:21,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:36:21,520 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:36:21,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:36:21,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:36:21,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:36:21,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:36:21,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:36:21,880 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:36:21,881 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:36:21,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl [2021-06-05 23:36:21,897 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl' [2021-06-05 23:36:21,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:36:21,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:36:21,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:36:21,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:36:21,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:36:21,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:36:21" (1/1) ... [2021-06-05 23:36:21,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:36:21" (1/1) ... [2021-06-05 23:36:21,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:36:21,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:36:21,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:36:21,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:36:21,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:36:21" (1/1) ... [2021-06-05 23:36:21,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:36:21" (1/1) ... [2021-06-05 23:36:21,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:36:21" (1/1) ... [2021-06-05 23:36:21,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:36:21" (1/1) ... [2021-06-05 23:36:21,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:36:21" (1/1) ... [2021-06-05 23:36:21,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:36:21" (1/1) ... [2021-06-05 23:36:21,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:36:21" (1/1) ... [2021-06-05 23:36:21,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:36:21,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:36:21,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:36:21,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:36:21,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:36:21" (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 [2021-06-05 23:36:22,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:36:22,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:36:22,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:36:22,070 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:36:22,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:36:22,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:36:22,070 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:36:22,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:36:22,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:36:22,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:36:22,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:36:22,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:36:22,072 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:36:22,237 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:36:22,238 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:36:22,239 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:36:22 BoogieIcfgContainer [2021-06-05 23:36:22,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:36:22,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:36:22,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:36:22,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:36:22,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:36:21" (1/2) ... [2021-06-05 23:36:22,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d4f3c29 and model type array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:36:22, skipping insertion in model container [2021-06-05 23:36:22,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:36:22" (2/2) ... [2021-06-05 23:36:22,245 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum-alt.wvr.bpl [2021-06-05 23:36:22,249 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:36:22,249 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:36:22,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:36:22,250 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:36:22,288 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 23:36:22,306 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 23:36:22,321 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:36:22,321 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:36:22,321 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:36:22,322 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:36:22,322 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:36:22,322 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:36:22,322 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:36:22,322 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:36:22,352 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-06-05 23:36:22,404 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:22,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:36:22,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:22,433 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:22,434 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:22,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2112338189, now seen corresponding path program 1 times [2021-06-05 23:36:22,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:22,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752454551] [2021-06-05 23:36:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:22,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:22,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752454551] [2021-06-05 23:36:22,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752454551] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:36:22,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:36:22,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:36:22,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400071814] [2021-06-05 23:36:22,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:36:22,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:22,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:36:22,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:36:22,602 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-06-05 23:36:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:22,639 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-06-05 23:36:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:36:22,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 [2021-06-05 23:36:22,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:22,653 INFO L225 Difference]: With dead ends: 298 [2021-06-05 23:36:22,654 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 23:36:22,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:36:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 23:36:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-06-05 23:36:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-06-05 23:36:22,718 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-06-05 23:36:22,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:22,719 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-06-05 23:36:22,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-06-05 23:36:22,719 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-06-05 23:36:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:36:22,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:22,722 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:22,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:36:22,722 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:22,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:22,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1377866598, now seen corresponding path program 1 times [2021-06-05 23:36:22,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:22,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073388945] [2021-06-05 23:36:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:22,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:22,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073388945] [2021-06-05 23:36:22,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073388945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:22,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991275139] [2021-06-05 23:36:22,817 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 [2021-06-05 23:36:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:22,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:36:22,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:23,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991275139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:23,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:23,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:36:23,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026847499] [2021-06-05 23:36:23,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:36:23,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:23,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:36:23,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:36:23,082 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-06-05 23:36:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:23,499 INFO L93 Difference]: Finished difference Result 1019 states and 2933 transitions. [2021-06-05 23:36:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:36:23,500 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 21 [2021-06-05 23:36:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:23,510 INFO L225 Difference]: With dead ends: 1019 [2021-06-05 23:36:23,510 INFO L226 Difference]: Without dead ends: 1019 [2021-06-05 23:36:23,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:36:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-06-05 23:36:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 253. [2021-06-05 23:36:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9523809523809526) internal successors, (744), 252 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 744 transitions. [2021-06-05 23:36:23,564 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 744 transitions. Word has length 21 [2021-06-05 23:36:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:23,565 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 744 transitions. [2021-06-05 23:36:23,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-06-05 23:36:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 744 transitions. [2021-06-05 23:36:23,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:36:23,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:23,571 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:23,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 23:36:23,789 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:23,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1571767266, now seen corresponding path program 2 times [2021-06-05 23:36:23,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:23,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202093085] [2021-06-05 23:36:23,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:23,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:23,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202093085] [2021-06-05 23:36:23,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202093085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:23,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111296694] [2021-06-05 23:36:23,880 INFO L93 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 [2021-06-05 23:36:23,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:23,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:23,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:36:23,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:24,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111296694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:24,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:24,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:36:24,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276302082] [2021-06-05 23:36:24,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:36:24,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:24,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:36:24,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:36:24,060 INFO L87 Difference]: Start difference. First operand 253 states and 744 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-06-05 23:36:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:24,402 INFO L93 Difference]: Finished difference Result 1035 states and 2973 transitions. [2021-06-05 23:36:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:36:24,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 21 [2021-06-05 23:36:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:24,408 INFO L225 Difference]: With dead ends: 1035 [2021-06-05 23:36:24,408 INFO L226 Difference]: Without dead ends: 1035 [2021-06-05 23:36:24,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:36:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-06-05 23:36:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 252. [2021-06-05 23:36:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9362549800796813) internal successors, (737), 251 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 737 transitions. [2021-06-05 23:36:24,428 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 737 transitions. Word has length 21 [2021-06-05 23:36:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:24,428 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 737 transitions. [2021-06-05 23:36:24,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-06-05 23:36:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 737 transitions. [2021-06-05 23:36:24,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:36:24,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:24,429 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:24,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:24,653 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:24,654 INFO L82 PathProgramCache]: Analyzing trace with hash -120635141, now seen corresponding path program 1 times [2021-06-05 23:36:24,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:24,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115550660] [2021-06-05 23:36:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:24,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:24,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115550660] [2021-06-05 23:36:24,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115550660] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:36:24,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:36:24,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 23:36:24,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143217191] [2021-06-05 23:36:24,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:36:24,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:24,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:36:24,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:36:24,711 INFO L87 Difference]: Start difference. First operand 252 states and 737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:24,794 INFO L93 Difference]: Finished difference Result 483 states and 1371 transitions. [2021-06-05 23:36:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:36:24,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:36:24,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:24,797 INFO L225 Difference]: With dead ends: 483 [2021-06-05 23:36:24,797 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 23:36:24,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:36:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 23:36:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 327. [2021-06-05 23:36:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.941717791411043) internal successors, (959), 326 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 959 transitions. [2021-06-05 23:36:24,810 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 959 transitions. Word has length 21 [2021-06-05 23:36:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:24,810 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 959 transitions. [2021-06-05 23:36:24,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 959 transitions. [2021-06-05 23:36:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:36:24,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:24,811 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:24,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 23:36:24,812 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:24,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1682109104, now seen corresponding path program 1 times [2021-06-05 23:36:24,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:24,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309055089] [2021-06-05 23:36:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:24,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:24,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309055089] [2021-06-05 23:36:24,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309055089] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:36:24,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:36:24,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 23:36:24,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380650468] [2021-06-05 23:36:24,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:36:24,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:24,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:36:24,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:36:24,852 INFO L87 Difference]: Start difference. First operand 327 states and 959 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:24,946 INFO L93 Difference]: Finished difference Result 539 states and 1537 transitions. [2021-06-05 23:36:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:36:24,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:36:24,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:24,949 INFO L225 Difference]: With dead ends: 539 [2021-06-05 23:36:24,950 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 23:36:24,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:36:24,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 23:36:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 398. [2021-06-05 23:36:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.929471032745592) internal successors, (1163), 397 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1163 transitions. [2021-06-05 23:36:24,966 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1163 transitions. Word has length 21 [2021-06-05 23:36:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:24,966 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1163 transitions. [2021-06-05 23:36:24,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1163 transitions. [2021-06-05 23:36:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:36:24,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:24,968 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:24,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 23:36:24,968 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1479238087, now seen corresponding path program 2 times [2021-06-05 23:36:24,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:24,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393112526] [2021-06-05 23:36:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:25,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:25,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393112526] [2021-06-05 23:36:25,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393112526] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:36:25,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:36:25,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 23:36:25,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475311119] [2021-06-05 23:36:25,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:36:25,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:25,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:36:25,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:36:25,040 INFO L87 Difference]: Start difference. First operand 398 states and 1163 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:25,086 INFO L93 Difference]: Finished difference Result 486 states and 1392 transitions. [2021-06-05 23:36:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:36:25,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:36:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:25,094 INFO L225 Difference]: With dead ends: 486 [2021-06-05 23:36:25,094 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 23:36:25,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:36:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 23:36:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 362. [2021-06-05 23:36:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9418282548476453) internal successors, (1062), 361 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) [2021-06-05 23:36:25,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1062 transitions. [2021-06-05 23:36:25,106 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1062 transitions. Word has length 21 [2021-06-05 23:36:25,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:25,106 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1062 transitions. [2021-06-05 23:36:25,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1062 transitions. [2021-06-05 23:36:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:36:25,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:25,108 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:25,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 23:36:25,108 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash -314434059, now seen corresponding path program 3 times [2021-06-05 23:36:25,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:25,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769306215] [2021-06-05 23:36:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:25,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:25,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769306215] [2021-06-05 23:36:25,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769306215] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:36:25,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:36:25,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 23:36:25,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304215942] [2021-06-05 23:36:25,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:36:25,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:25,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:36:25,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:36:25,172 INFO L87 Difference]: Start difference. First operand 362 states and 1062 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:25,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:25,238 INFO L93 Difference]: Finished difference Result 438 states and 1246 transitions. [2021-06-05 23:36:25,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:36:25,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:36:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:25,241 INFO L225 Difference]: With dead ends: 438 [2021-06-05 23:36:25,242 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 23:36:25,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:36:25,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 23:36:25,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2021-06-05 23:36:25,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2021-06-05 23:36:25,252 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2021-06-05 23:36:25,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:25,252 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2021-06-05 23:36:25,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2021-06-05 23:36:25,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:36:25,254 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:25,254 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:25,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 23:36:25,254 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1825817224, now seen corresponding path program 3 times [2021-06-05 23:36:25,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:25,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834394451] [2021-06-05 23:36:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:25,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:25,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834394451] [2021-06-05 23:36:25,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834394451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:25,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598850278] [2021-06-05 23:36:25,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:36:25,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:36:25,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:25,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:36:25,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:25,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598850278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:25,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:25,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 23:36:25,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441567124] [2021-06-05 23:36:25,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:36:25,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:25,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:36:25,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:36:25,388 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:25,653 INFO L93 Difference]: Finished difference Result 994 states and 2769 transitions. [2021-06-05 23:36:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:36:25,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:36:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:25,659 INFO L225 Difference]: With dead ends: 994 [2021-06-05 23:36:25,660 INFO L226 Difference]: Without dead ends: 994 [2021-06-05 23:36:25,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:36:25,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-05 23:36:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 323. [2021-06-05 23:36:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2021-06-05 23:36:25,677 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2021-06-05 23:36:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:25,679 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2021-06-05 23:36:25,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2021-06-05 23:36:25,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:36:25,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:25,680 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:25,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:25,903 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:25,903 INFO L82 PathProgramCache]: Analyzing trace with hash 156862832, now seen corresponding path program 2 times [2021-06-05 23:36:25,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:25,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275283339] [2021-06-05 23:36:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:25,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:25,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275283339] [2021-06-05 23:36:25,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275283339] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:36:25,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:36:25,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 23:36:25,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366671775] [2021-06-05 23:36:25,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:36:25,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:25,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:36:25,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:36:25,964 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:26,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:26,111 INFO L93 Difference]: Finished difference Result 466 states and 1366 transitions. [2021-06-05 23:36:26,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:36:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:36:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:26,115 INFO L225 Difference]: With dead ends: 466 [2021-06-05 23:36:26,115 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 23:36:26,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:36:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 23:36:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 276. [2021-06-05 23:36:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.92) internal successors, (803), 275 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 803 transitions. [2021-06-05 23:36:26,129 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 803 transitions. Word has length 21 [2021-06-05 23:36:26,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:26,129 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 803 transitions. [2021-06-05 23:36:26,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 803 transitions. [2021-06-05 23:36:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:36:26,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:26,131 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:26,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 23:36:26,131 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:26,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:26,132 INFO L82 PathProgramCache]: Analyzing trace with hash -2015035522, now seen corresponding path program 4 times [2021-06-05 23:36:26,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:26,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987980214] [2021-06-05 23:36:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:26,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:26,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987980214] [2021-06-05 23:36:26,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987980214] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:36:26,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:36:26,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 23:36:26,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684580337] [2021-06-05 23:36:26,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:36:26,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:26,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:36:26,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:36:26,183 INFO L87 Difference]: Start difference. First operand 276 states and 803 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:26,285 INFO L93 Difference]: Finished difference Result 541 states and 1520 transitions. [2021-06-05 23:36:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:36:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:36:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:26,288 INFO L225 Difference]: With dead ends: 541 [2021-06-05 23:36:26,288 INFO L226 Difference]: Without dead ends: 537 [2021-06-05 23:36:26,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:36:26,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-05 23:36:26,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 276. [2021-06-05 23:36:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9127272727272726) internal successors, (801), 275 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 801 transitions. [2021-06-05 23:36:26,298 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 801 transitions. Word has length 21 [2021-06-05 23:36:26,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:26,298 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 801 transitions. [2021-06-05 23:36:26,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 801 transitions. [2021-06-05 23:36:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:36:26,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:26,300 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:26,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 23:36:26,301 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:26,301 INFO L82 PathProgramCache]: Analyzing trace with hash -625514306, now seen corresponding path program 5 times [2021-06-05 23:36:26,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:26,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700377259] [2021-06-05 23:36:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:26,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:26,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700377259] [2021-06-05 23:36:26,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700377259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:26,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479005452] [2021-06-05 23:36:26,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:36:26,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:26,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:26,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:36:26,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:26,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479005452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:26,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:26,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:36:26,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781750125] [2021-06-05 23:36:26,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:36:26,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:26,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:36:26,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:36:26,490 INFO L87 Difference]: Start difference. First operand 276 states and 801 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:26,692 INFO L93 Difference]: Finished difference Result 760 states and 2180 transitions. [2021-06-05 23:36:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:36:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:36:26,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:26,697 INFO L225 Difference]: With dead ends: 760 [2021-06-05 23:36:26,697 INFO L226 Difference]: Without dead ends: 760 [2021-06-05 23:36:26,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:36:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-05 23:36:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 278. [2021-06-05 23:36:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.916967509025271) internal successors, (808), 277 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 808 transitions. [2021-06-05 23:36:26,710 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 808 transitions. Word has length 21 [2021-06-05 23:36:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:26,710 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 808 transitions. [2021-06-05 23:36:26,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 808 transitions. [2021-06-05 23:36:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:36:26,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:26,711 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:26,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:26,935 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:26,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:26,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1157135164, now seen corresponding path program 6 times [2021-06-05 23:36:26,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:26,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576018731] [2021-06-05 23:36:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:26,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:26,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576018731] [2021-06-05 23:36:26,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576018731] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:36:26,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:36:26,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 23:36:26,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102393383] [2021-06-05 23:36:26,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:36:26,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:26,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:36:26,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:36:26,966 INFO L87 Difference]: Start difference. First operand 278 states and 808 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:27,038 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2021-06-05 23:36:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:36:27,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:36:27,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:27,040 INFO L225 Difference]: With dead ends: 429 [2021-06-05 23:36:27,041 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 23:36:27,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:36:27,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 23:36:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 278. [2021-06-05 23:36:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9097472924187726) internal successors, (806), 277 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 806 transitions. [2021-06-05 23:36:27,048 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 806 transitions. Word has length 21 [2021-06-05 23:36:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:27,048 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 806 transitions. [2021-06-05 23:36:27,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:27,049 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 806 transitions. [2021-06-05 23:36:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:36:27,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:27,050 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:27,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 23:36:27,050 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:27,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:27,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1959126516, now seen corresponding path program 1 times [2021-06-05 23:36:27,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:27,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380872556] [2021-06-05 23:36:27,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:27,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:27,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380872556] [2021-06-05 23:36:27,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380872556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:27,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377859236] [2021-06-05 23:36:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 23:36:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:27,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:36:27,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:27,290 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 11 treesize of output 7 [2021-06-05 23:36:27,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:27,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:27,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:36:27,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 23:36:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:27,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377859236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:27,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:27,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-06-05 23:36:27,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498415206] [2021-06-05 23:36:27,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:36:27,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:27,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:36:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:36:27,330 INFO L87 Difference]: Start difference. First operand 278 states and 806 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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) [2021-06-05 23:36:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:27,427 INFO L93 Difference]: Finished difference Result 552 states and 1614 transitions. [2021-06-05 23:36:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:36:27,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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 24 [2021-06-05 23:36:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:27,431 INFO L225 Difference]: With dead ends: 552 [2021-06-05 23:36:27,432 INFO L226 Difference]: Without dead ends: 537 [2021-06-05 23:36:27,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:36:27,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-05 23:36:27,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 372. [2021-06-05 23:36:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.981132075471698) internal successors, (1106), 371 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) [2021-06-05 23:36:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1106 transitions. [2021-06-05 23:36:27,442 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1106 transitions. Word has length 24 [2021-06-05 23:36:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:27,442 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1106 transitions. [2021-06-05 23:36:27,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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) [2021-06-05 23:36:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1106 transitions. [2021-06-05 23:36:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:36:27,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:27,443 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:27,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 23:36:27,657 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:27,657 INFO L82 PathProgramCache]: Analyzing trace with hash 397652553, now seen corresponding path program 1 times [2021-06-05 23:36:27,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:27,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418827566] [2021-06-05 23:36:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:27,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:27,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418827566] [2021-06-05 23:36:27,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418827566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:27,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993842074] [2021-06-05 23:36:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 23:36:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:27,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:36:27,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:28,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:36:28,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:36:28,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:28,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:28,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:36:28,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2021-06-05 23:36:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:28,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993842074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:28,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:28,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-06-05 23:36:28,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879102368] [2021-06-05 23:36:28,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:36:28,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:28,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:36:28,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:36:28,110 INFO L87 Difference]: Start difference. First operand 372 states and 1106 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:28,594 INFO L93 Difference]: Finished difference Result 586 states and 1678 transitions. [2021-06-05 23:36:28,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:36:28,594 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:36:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:28,597 INFO L225 Difference]: With dead ends: 586 [2021-06-05 23:36:28,597 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 23:36:28,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:36:28,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 23:36:28,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 438. [2021-06-05 23:36:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.954233409610984) internal successors, (1291), 437 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1291 transitions. [2021-06-05 23:36:28,609 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1291 transitions. Word has length 24 [2021-06-05 23:36:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:28,609 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1291 transitions. [2021-06-05 23:36:28,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1291 transitions. [2021-06-05 23:36:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:36:28,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:28,610 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:28,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:28,833 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash 602801515, now seen corresponding path program 2 times [2021-06-05 23:36:28,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:28,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205557657] [2021-06-05 23:36:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:29,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:29,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205557657] [2021-06-05 23:36:29,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205557657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:29,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360258660] [2021-06-05 23:36:29,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-06-05 23:36:29,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:29,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:29,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:36:29,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:29,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:29,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 23:36:29,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:36:29,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:29,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:36:29,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 23:36:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:29,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360258660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:29,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:29,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-06-05 23:36:29,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503927347] [2021-06-05 23:36:29,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:36:29,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:36:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:36:29,245 INFO L87 Difference]: Start difference. First operand 438 states and 1291 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:29,769 INFO L93 Difference]: Finished difference Result 795 states and 2267 transitions. [2021-06-05 23:36:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:36:29,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:36:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:29,773 INFO L225 Difference]: With dead ends: 795 [2021-06-05 23:36:29,774 INFO L226 Difference]: Without dead ends: 780 [2021-06-05 23:36:29,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 515.4ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:36:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-05 23:36:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 439. [2021-06-05 23:36:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.958904109589041) internal successors, (1296), 438 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1296 transitions. [2021-06-05 23:36:29,787 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1296 transitions. Word has length 24 [2021-06-05 23:36:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:29,787 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1296 transitions. [2021-06-05 23:36:29,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1296 transitions. [2021-06-05 23:36:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:36:29,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:29,788 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:30,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 23:36:30,014 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:30,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1941464708, now seen corresponding path program 2 times [2021-06-05 23:36:30,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:30,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983736222] [2021-06-05 23:36:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:30,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:30,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983736222] [2021-06-05 23:36:30,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983736222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:30,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971496302] [2021-06-05 23:36:30,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:36:30,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:30,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:30,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:36:30,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:30,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:36:30,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:30,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:30,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:36:30,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 23:36:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:30,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971496302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:30,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:30,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 23:36:30,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264135054] [2021-06-05 23:36:30,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:36:30,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:30,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:36:30,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:36:30,206 INFO L87 Difference]: Start difference. First operand 439 states and 1296 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-06-05 23:36:30,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:30,296 INFO L93 Difference]: Finished difference Result 645 states and 1906 transitions. [2021-06-05 23:36:30,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:36:30,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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 24 [2021-06-05 23:36:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:30,300 INFO L225 Difference]: With dead ends: 645 [2021-06-05 23:36:30,300 INFO L226 Difference]: Without dead ends: 630 [2021-06-05 23:36:30,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:36:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-06-05 23:36:30,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 471. [2021-06-05 23:36:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9617021276595743) internal successors, (1392), 470 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1392 transitions. [2021-06-05 23:36:30,313 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1392 transitions. Word has length 24 [2021-06-05 23:36:30,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:30,313 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1392 transitions. [2021-06-05 23:36:30,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-06-05 23:36:30,314 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1392 transitions. [2021-06-05 23:36:30,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:36:30,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:30,315 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:30,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 23:36:30,538 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:30,538 INFO L82 PathProgramCache]: Analyzing trace with hash -745990585, now seen corresponding path program 3 times [2021-06-05 23:36:30,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:30,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20548492] [2021-06-05 23:36:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:30,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:30,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20548492] [2021-06-05 23:36:30,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20548492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:30,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135503354] [2021-06-05 23:36:30,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:36:30,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:36:30,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:30,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:36:30,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:30,844 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 11 treesize of output 7 [2021-06-05 23:36:30,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:30,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:30,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:36:30,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-06-05 23:36:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:30,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135503354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:30,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:30,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2021-06-05 23:36:30,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913499088] [2021-06-05 23:36:30,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:36:30,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:30,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:36:30,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:36:30,884 INFO L87 Difference]: Start difference. First operand 471 states and 1392 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-06-05 23:36:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:31,093 INFO L93 Difference]: Finished difference Result 592 states and 1679 transitions. [2021-06-05 23:36:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:36:31,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-06-05 23:36:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:31,097 INFO L225 Difference]: With dead ends: 592 [2021-06-05 23:36:31,097 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 23:36:31,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:36:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 23:36:31,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-06-05 23:36:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.9547413793103448) internal successors, (1371), 464 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1371 transitions. [2021-06-05 23:36:31,114 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1371 transitions. Word has length 24 [2021-06-05 23:36:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:31,115 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1371 transitions. [2021-06-05 23:36:31,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-06-05 23:36:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1371 transitions. [2021-06-05 23:36:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:36:31,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:31,118 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:31,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 23:36:31,341 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1226467769, now seen corresponding path program 4 times [2021-06-05 23:36:31,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:31,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542623831] [2021-06-05 23:36:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:31,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:31,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542623831] [2021-06-05 23:36:31,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542623831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:31,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184724458] [2021-06-05 23:36:31,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:36:31,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:36:31,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:31,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:36:31,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:31,614 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 11 treesize of output 7 [2021-06-05 23:36:31,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:31,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:31,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:36:31,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-06-05 23:36:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:31,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184724458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:31,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:31,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 23:36:31,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135476310] [2021-06-05 23:36:31,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:36:31,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:31,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:36:31,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:36:31,649 INFO L87 Difference]: Start difference. First operand 465 states and 1371 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 23:36:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:31,901 INFO L93 Difference]: Finished difference Result 683 states and 1988 transitions. [2021-06-05 23:36:31,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:36:31,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 24 [2021-06-05 23:36:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:31,905 INFO L225 Difference]: With dead ends: 683 [2021-06-05 23:36:31,905 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 23:36:31,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:36:31,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 23:36:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 469. [2021-06-05 23:36:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.950854700854701) internal successors, (1381), 468 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:31,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1381 transitions. [2021-06-05 23:36:31,916 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1381 transitions. Word has length 24 [2021-06-05 23:36:31,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:31,916 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1381 transitions. [2021-06-05 23:36:31,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-06-05 23:36:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1381 transitions. [2021-06-05 23:36:31,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:36:31,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:31,917 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:32,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:32,141 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:32,141 INFO L82 PathProgramCache]: Analyzing trace with hash 572535559, now seen corresponding path program 5 times [2021-06-05 23:36:32,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:32,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033531632] [2021-06-05 23:36:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:32,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:32,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033531632] [2021-06-05 23:36:32,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033531632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:32,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515630582] [2021-06-05 23:36:32,328 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 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 [2021-06-05 23:36:32,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:32,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:32,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:36:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:32,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:32,471 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 23:36:32,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:36:32,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:32,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:36:32,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:28 [2021-06-05 23:36:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:32,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515630582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:32,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:32,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 23:36:32,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314286275] [2021-06-05 23:36:32,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:36:32,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:32,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:36:32,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:36:32,566 INFO L87 Difference]: Start difference. First operand 469 states and 1381 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) [2021-06-05 23:36:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:32,945 INFO L93 Difference]: Finished difference Result 759 states and 2222 transitions. [2021-06-05 23:36:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:36:32,946 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 24 [2021-06-05 23:36:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:32,949 INFO L225 Difference]: With dead ends: 759 [2021-06-05 23:36:32,949 INFO L226 Difference]: Without dead ends: 744 [2021-06-05 23:36:32,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 412.9ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:36:32,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-06-05 23:36:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 471. [2021-06-05 23:36:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9553191489361703) internal successors, (1389), 470 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1389 transitions. [2021-06-05 23:36:32,960 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1389 transitions. Word has length 24 [2021-06-05 23:36:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:32,960 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1389 transitions. [2021-06-05 23:36:32,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) [2021-06-05 23:36:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1389 transitions. [2021-06-05 23:36:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:32,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:32,962 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:33,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:33,178 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:33,179 INFO L82 PathProgramCache]: Analyzing trace with hash 606500413, now seen corresponding path program 3 times [2021-06-05 23:36:33,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:33,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081106396] [2021-06-05 23:36:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:33,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:33,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081106396] [2021-06-05 23:36:33,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081106396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:33,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314467238] [2021-06-05 23:36:33,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:36:33,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:36:33,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:33,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:33,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314467238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:33,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:33,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:36:33,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110157514] [2021-06-05 23:36:33,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:36:33,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:33,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:36:33,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:36:33,365 INFO L87 Difference]: Start difference. First operand 471 states and 1389 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:34,085 INFO L93 Difference]: Finished difference Result 2301 states and 6530 transitions. [2021-06-05 23:36:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:36:34,086 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:34,095 INFO L225 Difference]: With dead ends: 2301 [2021-06-05 23:36:34,095 INFO L226 Difference]: Without dead ends: 2301 [2021-06-05 23:36:34,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=498, Invalid=1664, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:36:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-06-05 23:36:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 593. [2021-06-05 23:36:34,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.170608108108108) internal successors, (1877), 592 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1877 transitions. [2021-06-05 23:36:34,124 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1877 transitions. Word has length 27 [2021-06-05 23:36:34,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:34,125 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1877 transitions. [2021-06-05 23:36:34,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:34,125 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1877 transitions. [2021-06-05 23:36:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:34,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:34,126 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:34,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:34,350 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:34,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:34,350 INFO L82 PathProgramCache]: Analyzing trace with hash 412599745, now seen corresponding path program 4 times [2021-06-05 23:36:34,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:34,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690565313] [2021-06-05 23:36:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:34,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:34,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690565313] [2021-06-05 23:36:34,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690565313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:34,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223882015] [2021-06-05 23:36:34,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:36:34,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:36:34,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:34,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:34,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:34,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223882015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:34,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:34,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:36:34,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127553641] [2021-06-05 23:36:34,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:36:34,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:34,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:36:34,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:36:34,522 INFO L87 Difference]: Start difference. First operand 593 states and 1877 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:35,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:35,167 INFO L93 Difference]: Finished difference Result 2258 states and 6445 transitions. [2021-06-05 23:36:35,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:36:35,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:35,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:35,176 INFO L225 Difference]: With dead ends: 2258 [2021-06-05 23:36:35,177 INFO L226 Difference]: Without dead ends: 2258 [2021-06-05 23:36:35,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 417.7ms TimeCoverageRelationStatistics Valid=525, Invalid=1731, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:36:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-06-05 23:36:35,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 577. [2021-06-05 23:36:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1354166666666665) internal successors, (1806), 576 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1806 transitions. [2021-06-05 23:36:35,205 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1806 transitions. Word has length 27 [2021-06-05 23:36:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:35,205 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1806 transitions. [2021-06-05 23:36:35,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1806 transitions. [2021-06-05 23:36:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:35,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:35,207 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:35,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 23:36:35,429 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:35,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1028264061, now seen corresponding path program 5 times [2021-06-05 23:36:35,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:35,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453231513] [2021-06-05 23:36:35,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:35,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:35,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453231513] [2021-06-05 23:36:35,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453231513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:35,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721149347] [2021-06-05 23:36:35,476 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 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 [2021-06-05 23:36:35,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:36:35,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:35,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:35,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:35,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721149347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:35,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:35,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:36:35,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302047098] [2021-06-05 23:36:35,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:36:35,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:35,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:36:35,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:36:35,617 INFO L87 Difference]: Start difference. First operand 577 states and 1806 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:36,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:36,064 INFO L93 Difference]: Finished difference Result 1609 states and 4647 transitions. [2021-06-05 23:36:36,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:36:36,064 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:36,069 INFO L225 Difference]: With dead ends: 1609 [2021-06-05 23:36:36,070 INFO L226 Difference]: Without dead ends: 1609 [2021-06-05 23:36:36,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-06-05 23:36:36,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 585. [2021-06-05 23:36:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.125) internal successors, (1825), 584 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1825 transitions. [2021-06-05 23:36:36,089 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1825 transitions. Word has length 27 [2021-06-05 23:36:36,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:36,089 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1825 transitions. [2021-06-05 23:36:36,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1825 transitions. [2021-06-05 23:36:36,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:36,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:36,091 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:36,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:36,314 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:36,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:36,315 INFO L82 PathProgramCache]: Analyzing trace with hash -954973550, now seen corresponding path program 6 times [2021-06-05 23:36:36,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:36,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961046908] [2021-06-05 23:36:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:36,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:36,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961046908] [2021-06-05 23:36:36,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961046908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:36,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372841647] [2021-06-05 23:36:36,364 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 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 [2021-06-05 23:36:36,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:36:36,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:36,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:36,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372841647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:36,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:36,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:36:36,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545330208] [2021-06-05 23:36:36,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:36:36,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:36:36,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:36:36,490 INFO L87 Difference]: Start difference. First operand 585 states and 1825 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:36,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:36,904 INFO L93 Difference]: Finished difference Result 1639 states and 4720 transitions. [2021-06-05 23:36:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:36:36,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:36,909 INFO L225 Difference]: With dead ends: 1639 [2021-06-05 23:36:36,909 INFO L226 Difference]: Without dead ends: 1639 [2021-06-05 23:36:36,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:36,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-06-05 23:36:36,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 596. [2021-06-05 23:36:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.104201680672269) internal successors, (1847), 595 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1847 transitions. [2021-06-05 23:36:36,930 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1847 transitions. Word has length 27 [2021-06-05 23:36:36,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:36,930 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1847 transitions. [2021-06-05 23:36:36,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1847 transitions. [2021-06-05 23:36:36,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:36,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:36,931 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:37,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 23:36:37,156 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:37,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:37,156 INFO L82 PathProgramCache]: Analyzing trace with hash -535240646, now seen corresponding path program 6 times [2021-06-05 23:36:37,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:37,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480427186] [2021-06-05 23:36:37,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:37,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:37,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480427186] [2021-06-05 23:36:37,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480427186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:37,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401983853] [2021-06-05 23:36:37,188 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 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 [2021-06-05 23:36:37,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:36:37,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:37,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:36:37,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:37,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401983853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:37,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:37,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 23:36:37,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610771365] [2021-06-05 23:36:37,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:36:37,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:37,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:36:37,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:36:37,280 INFO L87 Difference]: Start difference. First operand 596 states and 1847 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-06-05 23:36:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:37,406 INFO L93 Difference]: Finished difference Result 1374 states and 4109 transitions. [2021-06-05 23:36:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:36:37,406 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 27 [2021-06-05 23:36:37,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:37,409 INFO L225 Difference]: With dead ends: 1374 [2021-06-05 23:36:37,409 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 23:36:37,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:36:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 23:36:37,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 911. [2021-06-05 23:36:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.197802197802198) internal successors, (2910), 910 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:37,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2910 transitions. [2021-06-05 23:36:37,437 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2910 transitions. Word has length 27 [2021-06-05 23:36:37,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:37,437 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 2910 transitions. [2021-06-05 23:36:37,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-06-05 23:36:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2910 transitions. [2021-06-05 23:36:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:37,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:37,439 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:37,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 23:36:37,657 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:37,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:37,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1446478511, now seen corresponding path program 1 times [2021-06-05 23:36:37,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:37,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204204713] [2021-06-05 23:36:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:37,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:37,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204204713] [2021-06-05 23:36:37,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204204713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:37,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931990073] [2021-06-05 23:36:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 23:36:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:36:37,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:37,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931990073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:37,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:37,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 23:36:37,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360781980] [2021-06-05 23:36:37,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:36:37,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:37,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:36:37,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:36:37,808 INFO L87 Difference]: Start difference. First operand 911 states and 2910 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 23:36:38,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:38,079 INFO L93 Difference]: Finished difference Result 1491 states and 4323 transitions. [2021-06-05 23:36:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:36:38,079 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-06-05 23:36:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:38,082 INFO L225 Difference]: With dead ends: 1491 [2021-06-05 23:36:38,082 INFO L226 Difference]: Without dead ends: 1465 [2021-06-05 23:36:38,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:36:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-06-05 23:36:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 969. [2021-06-05 23:36:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.145661157024793) internal successors, (3045), 968 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3045 transitions. [2021-06-05 23:36:38,106 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3045 transitions. Word has length 27 [2021-06-05 23:36:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:38,106 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3045 transitions. [2021-06-05 23:36:38,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 23:36:38,107 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3045 transitions. [2021-06-05 23:36:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:38,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:38,109 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:38,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 23:36:38,332 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:38,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1928537542, now seen corresponding path program 7 times [2021-06-05 23:36:38,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:38,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782059752] [2021-06-05 23:36:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:38,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:38,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782059752] [2021-06-05 23:36:38,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782059752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:38,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274908939] [2021-06-05 23:36:38,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:36:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:38,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:38,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:38,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274908939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:38,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:38,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:36:38,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786475583] [2021-06-05 23:36:38,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:36:38,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:38,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:36:38,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:36:38,491 INFO L87 Difference]: Start difference. First operand 969 states and 3045 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:38,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:38,674 INFO L93 Difference]: Finished difference Result 1664 states and 5013 transitions. [2021-06-05 23:36:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:36:38,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:38,678 INFO L225 Difference]: With dead ends: 1664 [2021-06-05 23:36:38,678 INFO L226 Difference]: Without dead ends: 1632 [2021-06-05 23:36:38,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:36:38,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-05 23:36:38,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1122. [2021-06-05 23:36:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.1793041926851027) internal successors, (3564), 1121 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3564 transitions. [2021-06-05 23:36:38,705 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3564 transitions. Word has length 27 [2021-06-05 23:36:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:38,705 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3564 transitions. [2021-06-05 23:36:38,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3564 transitions. [2021-06-05 23:36:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:38,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:38,708 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:38,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 23:36:38,932 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash -337091691, now seen corresponding path program 2 times [2021-06-05 23:36:38,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:38,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284547375] [2021-06-05 23:36:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:38,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:38,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284547375] [2021-06-05 23:36:38,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284547375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:38,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868077071] [2021-06-05 23:36:38,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:36:39,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:39,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:39,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:36:39,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:39,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868077071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:39,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:39,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 23:36:39,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696944056] [2021-06-05 23:36:39,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:36:39,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:39,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:36:39,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:36:39,081 INFO L87 Difference]: Start difference. First operand 1122 states and 3564 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:39,402 INFO L93 Difference]: Finished difference Result 1812 states and 5305 transitions. [2021-06-05 23:36:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:36:39,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:39,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:39,406 INFO L225 Difference]: With dead ends: 1812 [2021-06-05 23:36:39,406 INFO L226 Difference]: Without dead ends: 1790 [2021-06-05 23:36:39,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:36:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-06-05 23:36:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1115. [2021-06-05 23:36:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 3.1867145421903054) internal successors, (3550), 1114 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 3550 transitions. [2021-06-05 23:36:39,435 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 3550 transitions. Word has length 27 [2021-06-05 23:36:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:39,436 INFO L482 AbstractCegarLoop]: Abstraction has 1115 states and 3550 transitions. [2021-06-05 23:36:39,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 3550 transitions. [2021-06-05 23:36:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:39,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:39,438 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:39,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:39,649 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:39,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:39,649 INFO L82 PathProgramCache]: Analyzing trace with hash 570714739, now seen corresponding path program 3 times [2021-06-05 23:36:39,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:39,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017172496] [2021-06-05 23:36:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:39,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:39,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017172496] [2021-06-05 23:36:39,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017172496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:39,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174116230] [2021-06-05 23:36:39,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:36:39,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:36:39,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:39,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:36:39,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:39,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174116230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:39,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:39,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 23:36:39,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10334315] [2021-06-05 23:36:39,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:36:39,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:39,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:36:39,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:36:39,775 INFO L87 Difference]: Start difference. First operand 1115 states and 3550 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-06-05 23:36:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:39,984 INFO L93 Difference]: Finished difference Result 2086 states and 6158 transitions. [2021-06-05 23:36:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:36:39,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 27 [2021-06-05 23:36:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:39,990 INFO L225 Difference]: With dead ends: 2086 [2021-06-05 23:36:39,990 INFO L226 Difference]: Without dead ends: 2060 [2021-06-05 23:36:39,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:36:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-06-05 23:36:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1141. [2021-06-05 23:36:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.207894736842105) internal successors, (3657), 1140 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3657 transitions. [2021-06-05 23:36:40,020 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3657 transitions. Word has length 27 [2021-06-05 23:36:40,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:40,020 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3657 transitions. [2021-06-05 23:36:40,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-06-05 23:36:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3657 transitions. [2021-06-05 23:36:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:40,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:40,023 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:40,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 23:36:40,237 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:40,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:40,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2074608542, now seen corresponding path program 7 times [2021-06-05 23:36:40,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:40,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792524337] [2021-06-05 23:36:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:40,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:40,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792524337] [2021-06-05 23:36:40,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792524337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:40,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944760942] [2021-06-05 23:36:40,266 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 [2021-06-05 23:36:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:40,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:36:40,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:40,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944760942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:40,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:40,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 23:36:40,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573584872] [2021-06-05 23:36:40,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:36:40,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:36:40,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:36:40,357 INFO L87 Difference]: Start difference. First operand 1141 states and 3657 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:40,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:40,527 INFO L93 Difference]: Finished difference Result 1777 states and 5270 transitions. [2021-06-05 23:36:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:36:40,528 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:40,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:40,532 INFO L225 Difference]: With dead ends: 1777 [2021-06-05 23:36:40,532 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 23:36:40,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:36:40,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 23:36:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1147. [2021-06-05 23:36:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.1928446771378707) internal successors, (3659), 1146 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3659 transitions. [2021-06-05 23:36:40,574 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3659 transitions. Word has length 27 [2021-06-05 23:36:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:40,575 INFO L482 AbstractCegarLoop]: Abstraction has 1147 states and 3659 transitions. [2021-06-05 23:36:40,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3659 transitions. [2021-06-05 23:36:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:40,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:40,577 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:40,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 23:36:40,801 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:40,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1728029405, now seen corresponding path program 8 times [2021-06-05 23:36:40,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:40,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989939915] [2021-06-05 23:36:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:40,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:40,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989939915] [2021-06-05 23:36:40,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989939915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:40,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062022834] [2021-06-05 23:36:40,839 INFO L93 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 [2021-06-05 23:36:40,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:40,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:40,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:40,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:40,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062022834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:40,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:40,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 23:36:40,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073162881] [2021-06-05 23:36:40,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:36:40,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:40,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:36:40,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:36:40,940 INFO L87 Difference]: Start difference. First operand 1147 states and 3659 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:41,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:41,475 INFO L93 Difference]: Finished difference Result 4076 states and 11819 transitions. [2021-06-05 23:36:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:36:41,479 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:41,486 INFO L225 Difference]: With dead ends: 4076 [2021-06-05 23:36:41,486 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 23:36:41,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=362, Invalid=1120, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:36:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 23:36:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 1262. [2021-06-05 23:36:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.274385408406027) internal successors, (4129), 1261 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:41,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4129 transitions. [2021-06-05 23:36:41,534 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4129 transitions. Word has length 27 [2021-06-05 23:36:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:41,534 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4129 transitions. [2021-06-05 23:36:41,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4129 transitions. [2021-06-05 23:36:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:41,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:41,536 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:41,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:41,758 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash -584257835, now seen corresponding path program 4 times [2021-06-05 23:36:41,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:41,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810168042] [2021-06-05 23:36:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:41,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:41,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810168042] [2021-06-05 23:36:41,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810168042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:41,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655566009] [2021-06-05 23:36:41,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:36:41,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:36:41,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:36:41,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:41,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655566009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:41,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:41,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 23:36:41,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829894379] [2021-06-05 23:36:41,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:36:41,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:41,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:36:41,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:36:41,892 INFO L87 Difference]: Start difference. First operand 1262 states and 4129 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-06-05 23:36:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:42,123 INFO L93 Difference]: Finished difference Result 2048 states and 6254 transitions. [2021-06-05 23:36:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:36:42,123 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 27 [2021-06-05 23:36:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:42,125 INFO L225 Difference]: With dead ends: 2048 [2021-06-05 23:36:42,126 INFO L226 Difference]: Without dead ends: 2048 [2021-06-05 23:36:42,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:36:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-06-05 23:36:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1280. [2021-06-05 23:36:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.2752150117279126) internal successors, (4189), 1279 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4189 transitions. [2021-06-05 23:36:42,152 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4189 transitions. Word has length 27 [2021-06-05 23:36:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:42,152 INFO L482 AbstractCegarLoop]: Abstraction has 1280 states and 4189 transitions. [2021-06-05 23:36:42,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-06-05 23:36:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4189 transitions. [2021-06-05 23:36:42,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:42,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:42,155 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:42,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 23:36:42,369 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:42,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:42,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1538811107, now seen corresponding path program 9 times [2021-06-05 23:36:42,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:42,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748243063] [2021-06-05 23:36:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:42,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:42,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748243063] [2021-06-05 23:36:42,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748243063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:42,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346962520] [2021-06-05 23:36:42,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:36:42,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:36:42,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:42,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:42,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:42,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346962520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:42,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:42,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 23:36:42,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918340610] [2021-06-05 23:36:42,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:36:42,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:42,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:36:42,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:36:42,529 INFO L87 Difference]: Start difference. First operand 1280 states and 4189 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:43,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:43,080 INFO L93 Difference]: Finished difference Result 3885 states and 11397 transitions. [2021-06-05 23:36:43,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:36:43,080 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:43,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:43,085 INFO L225 Difference]: With dead ends: 3885 [2021-06-05 23:36:43,085 INFO L226 Difference]: Without dead ends: 3877 [2021-06-05 23:36:43,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 244.1ms TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:36:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3877 states. [2021-06-05 23:36:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3877 to 1292. [2021-06-05 23:36:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.260263361735089) internal successors, (4209), 1291 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4209 transitions. [2021-06-05 23:36:43,126 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4209 transitions. Word has length 27 [2021-06-05 23:36:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:43,126 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4209 transitions. [2021-06-05 23:36:43,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4209 transitions. [2021-06-05 23:36:43,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:43,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:43,129 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:43,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:43,345 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:43,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1366634973, now seen corresponding path program 10 times [2021-06-05 23:36:43,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:43,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513558521] [2021-06-05 23:36:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:43,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:43,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513558521] [2021-06-05 23:36:43,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513558521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:43,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668755354] [2021-06-05 23:36:43,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:36:43,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:36:43,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:43,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:43,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:43,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668755354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:43,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:43,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 23:36:43,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906348178] [2021-06-05 23:36:43,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:36:43,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:43,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:36:43,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:36:43,522 INFO L87 Difference]: Start difference. First operand 1292 states and 4209 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:44,156 INFO L93 Difference]: Finished difference Result 3967 states and 11593 transitions. [2021-06-05 23:36:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:36:44,157 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:44,162 INFO L225 Difference]: With dead ends: 3967 [2021-06-05 23:36:44,162 INFO L226 Difference]: Without dead ends: 3967 [2021-06-05 23:36:44,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=423, Invalid=1299, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:36:44,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-06-05 23:36:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 1392. [2021-06-05 23:36:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.250179726815241) internal successors, (4521), 1391 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4521 transitions. [2021-06-05 23:36:44,199 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4521 transitions. Word has length 27 [2021-06-05 23:36:44,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:44,200 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4521 transitions. [2021-06-05 23:36:44,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:44,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4521 transitions. [2021-06-05 23:36:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:44,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:44,203 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:44,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 23:36:44,417 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:44,417 INFO L82 PathProgramCache]: Analyzing trace with hash 416014497, now seen corresponding path program 11 times [2021-06-05 23:36:44,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:44,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570330408] [2021-06-05 23:36:44,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:44,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:44,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570330408] [2021-06-05 23:36:44,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570330408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:44,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730226636] [2021-06-05 23:36:44,460 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 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 [2021-06-05 23:36:44,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:36:44,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:44,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:44,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:44,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730226636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:44,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:44,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 23:36:44,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50984868] [2021-06-05 23:36:44,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:36:44,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:44,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:36:44,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:36:44,571 INFO L87 Difference]: Start difference. First operand 1392 states and 4521 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:45,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:45,226 INFO L93 Difference]: Finished difference Result 3712 states and 10972 transitions. [2021-06-05 23:36:45,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:36:45,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:45,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:45,231 INFO L225 Difference]: With dead ends: 3712 [2021-06-05 23:36:45,231 INFO L226 Difference]: Without dead ends: 3704 [2021-06-05 23:36:45,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=376, Invalid=1106, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:36:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-06-05 23:36:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 1392. [2021-06-05 23:36:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.2473040977713876) internal successors, (4517), 1391 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4517 transitions. [2021-06-05 23:36:45,263 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4517 transitions. Word has length 27 [2021-06-05 23:36:45,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:45,263 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4517 transitions. [2021-06-05 23:36:45,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:45,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4517 transitions. [2021-06-05 23:36:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:45,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:45,266 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:45,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 23:36:45,481 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:45,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1631157469, now seen corresponding path program 12 times [2021-06-05 23:36:45,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:45,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184220393] [2021-06-05 23:36:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:45,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:45,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184220393] [2021-06-05 23:36:45,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184220393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:45,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96267496] [2021-06-05 23:36:45,513 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 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 [2021-06-05 23:36:45,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 23:36:45,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:45,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:45,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:45,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96267496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:45,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:45,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:36:45,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075764609] [2021-06-05 23:36:45,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:36:45,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:45,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:36:45,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:36:45,613 INFO L87 Difference]: Start difference. First operand 1392 states and 4517 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:45,961 INFO L93 Difference]: Finished difference Result 3014 states and 9077 transitions. [2021-06-05 23:36:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:36:45,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:45,965 INFO L225 Difference]: With dead ends: 3014 [2021-06-05 23:36:45,965 INFO L226 Difference]: Without dead ends: 3014 [2021-06-05 23:36:45,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:36:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2021-06-05 23:36:45,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 1410. [2021-06-05 23:36:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.2462739531582683) internal successors, (4574), 1409 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4574 transitions. [2021-06-05 23:36:45,993 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4574 transitions. Word has length 27 [2021-06-05 23:36:45,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:45,993 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4574 transitions. [2021-06-05 23:36:45,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:45,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4574 transitions. [2021-06-05 23:36:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:45,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:45,996 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:46,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 23:36:46,201 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:46,201 INFO L82 PathProgramCache]: Analyzing trace with hash 733023956, now seen corresponding path program 8 times [2021-06-05 23:36:46,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:46,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868810742] [2021-06-05 23:36:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:46,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:46,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868810742] [2021-06-05 23:36:46,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868810742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:46,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132908203] [2021-06-05 23:36:46,236 INFO L93 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 [2021-06-05 23:36:46,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:46,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:46,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:46,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:46,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132908203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:46,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:46,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:36:46,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619805675] [2021-06-05 23:36:46,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:36:46,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:36:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:36:46,327 INFO L87 Difference]: Start difference. First operand 1410 states and 4574 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 23:36:46,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:46,628 INFO L93 Difference]: Finished difference Result 3028 states and 9102 transitions. [2021-06-05 23:36:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:36:46,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-06-05 23:36:46,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:46,632 INFO L225 Difference]: With dead ends: 3028 [2021-06-05 23:36:46,632 INFO L226 Difference]: Without dead ends: 3028 [2021-06-05 23:36:46,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:36:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-06-05 23:36:46,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 1426. [2021-06-05 23:36:46,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.2435087719298243) internal successors, (4622), 1425 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4622 transitions. [2021-06-05 23:36:46,667 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4622 transitions. Word has length 27 [2021-06-05 23:36:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:46,667 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4622 transitions. [2021-06-05 23:36:46,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 23:36:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4622 transitions. [2021-06-05 23:36:46,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:46,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:46,670 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:46,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 23:36:46,891 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:46,891 INFO L82 PathProgramCache]: Analyzing trace with hash 645299584, now seen corresponding path program 9 times [2021-06-05 23:36:46,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:46,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449926575] [2021-06-05 23:36:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:46,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:46,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449926575] [2021-06-05 23:36:46,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449926575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:46,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43260774] [2021-06-05 23:36:46,927 INFO L93 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 [2021-06-05 23:36:46,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:36:46,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:46,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:47,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43260774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:47,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:47,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:36:47,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906307810] [2021-06-05 23:36:47,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:36:47,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:47,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:36:47,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:36:47,014 INFO L87 Difference]: Start difference. First operand 1426 states and 4622 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 23:36:47,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:47,469 INFO L93 Difference]: Finished difference Result 3515 states and 10389 transitions. [2021-06-05 23:36:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:36:47,469 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-06-05 23:36:47,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:47,474 INFO L225 Difference]: With dead ends: 3515 [2021-06-05 23:36:47,474 INFO L226 Difference]: Without dead ends: 3515 [2021-06-05 23:36:47,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:36:47,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2021-06-05 23:36:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 1494. [2021-06-05 23:36:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.2391158740790353) internal successors, (4836), 1493 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 4836 transitions. [2021-06-05 23:36:47,514 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 4836 transitions. Word has length 27 [2021-06-05 23:36:47,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:47,514 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 4836 transitions. [2021-06-05 23:36:47,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 23:36:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 4836 transitions. [2021-06-05 23:36:47,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:47,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:47,518 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:47,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 23:36:47,741 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash 317969308, now seen corresponding path program 10 times [2021-06-05 23:36:47,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:47,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251122364] [2021-06-05 23:36:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:47,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:47,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251122364] [2021-06-05 23:36:47,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251122364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:47,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962795596] [2021-06-05 23:36:47,777 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:36:47,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:36:47,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:47,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:47,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:47,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962795596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:47,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:47,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:36:47,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035804745] [2021-06-05 23:36:47,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:36:47,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:47,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:36:47,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:36:47,904 INFO L87 Difference]: Start difference. First operand 1494 states and 4836 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:48,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:48,177 INFO L93 Difference]: Finished difference Result 3812 states and 11703 transitions. [2021-06-05 23:36:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:36:48,177 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:48,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:48,182 INFO L225 Difference]: With dead ends: 3812 [2021-06-05 23:36:48,182 INFO L226 Difference]: Without dead ends: 3805 [2021-06-05 23:36:48,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-06-05 23:36:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 2152. [2021-06-05 23:36:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 3.3421664342166433) internal successors, (7189), 2151 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 7189 transitions. [2021-06-05 23:36:48,230 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 7189 transitions. Word has length 27 [2021-06-05 23:36:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:48,230 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 7189 transitions. [2021-06-05 23:36:48,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 7189 transitions. [2021-06-05 23:36:48,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:48,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:48,233 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:48,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:48,434 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:48,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:48,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1267266998, now seen corresponding path program 11 times [2021-06-05 23:36:48,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:48,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977463024] [2021-06-05 23:36:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:48,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:48,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977463024] [2021-06-05 23:36:48,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977463024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:48,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743022943] [2021-06-05 23:36:48,482 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 [2021-06-05 23:36:48,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:36:48,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:48,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:48,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:48,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743022943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:48,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:48,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:36:48,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232368893] [2021-06-05 23:36:48,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:36:48,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:48,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:36:48,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:36:48,581 INFO L87 Difference]: Start difference. First operand 2152 states and 7189 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:48,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:48,855 INFO L93 Difference]: Finished difference Result 3889 states and 11952 transitions. [2021-06-05 23:36:48,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:36:48,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:48,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:48,860 INFO L225 Difference]: With dead ends: 3889 [2021-06-05 23:36:48,860 INFO L226 Difference]: Without dead ends: 3889 [2021-06-05 23:36:48,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:48,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-06-05 23:36:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 2116. [2021-06-05 23:36:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 3.315839243498818) internal successors, (7013), 2115 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 7013 transitions. [2021-06-05 23:36:48,890 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 7013 transitions. Word has length 27 [2021-06-05 23:36:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:48,890 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 7013 transitions. [2021-06-05 23:36:48,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 7013 transitions. [2021-06-05 23:36:48,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:48,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:48,893 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:49,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:49,094 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:49,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:49,094 INFO L82 PathProgramCache]: Analyzing trace with hash -904631356, now seen corresponding path program 12 times [2021-06-05 23:36:49,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:49,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991216862] [2021-06-05 23:36:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:49,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:49,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991216862] [2021-06-05 23:36:49,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991216862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:49,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793799315] [2021-06-05 23:36:49,130 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 [2021-06-05 23:36:49,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:36:49,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:49,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:49,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:49,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793799315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:49,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:49,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:36:49,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275075122] [2021-06-05 23:36:49,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:36:49,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:49,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:36:49,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:36:49,212 INFO L87 Difference]: Start difference. First operand 2116 states and 7013 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 23:36:49,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:49,627 INFO L93 Difference]: Finished difference Result 3915 states and 12164 transitions. [2021-06-05 23:36:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:36:49,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-06-05 23:36:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:49,632 INFO L225 Difference]: With dead ends: 3915 [2021-06-05 23:36:49,632 INFO L226 Difference]: Without dead ends: 3911 [2021-06-05 23:36:49,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:36:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2021-06-05 23:36:49,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 2114. [2021-06-05 23:36:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 3.313771888310459) internal successors, (7002), 2113 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 7002 transitions. [2021-06-05 23:36:49,665 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 7002 transitions. Word has length 27 [2021-06-05 23:36:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:49,665 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 7002 transitions. [2021-06-05 23:36:49,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 23:36:49,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 7002 transitions. [2021-06-05 23:36:49,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:49,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:49,669 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:49,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 23:36:49,884 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:49,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:49,884 INFO L82 PathProgramCache]: Analyzing trace with hash 741045571, now seen corresponding path program 5 times [2021-06-05 23:36:49,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:49,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492078136] [2021-06-05 23:36:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:49,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:49,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492078136] [2021-06-05 23:36:49,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492078136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:49,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192200672] [2021-06-05 23:36:49,911 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 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 [2021-06-05 23:36:49,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:49,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:36:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:50,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192200672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:50,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:50,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 23:36:50,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879534749] [2021-06-05 23:36:50,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:36:50,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:36:50,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:36:50,001 INFO L87 Difference]: Start difference. First operand 2114 states and 7002 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-05 23:36:50,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:50,281 INFO L93 Difference]: Finished difference Result 3295 states and 10178 transitions. [2021-06-05 23:36:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:36:50,282 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 27 [2021-06-05 23:36:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:50,286 INFO L225 Difference]: With dead ends: 3295 [2021-06-05 23:36:50,286 INFO L226 Difference]: Without dead ends: 3280 [2021-06-05 23:36:50,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:36:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-05 23:36:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2176. [2021-06-05 23:36:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.331494252873563) internal successors, (7246), 2175 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7246 transitions. [2021-06-05 23:36:50,316 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7246 transitions. Word has length 27 [2021-06-05 23:36:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:50,317 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7246 transitions. [2021-06-05 23:36:50,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-05 23:36:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7246 transitions. [2021-06-05 23:36:50,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:50,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:50,321 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:50,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:50,521 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:50,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:50,522 INFO L82 PathProgramCache]: Analyzing trace with hash 989889791, now seen corresponding path program 6 times [2021-06-05 23:36:50,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:50,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083245626] [2021-06-05 23:36:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:50,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:50,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083245626] [2021-06-05 23:36:50,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083245626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:50,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566241375] [2021-06-05 23:36:50,547 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 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 [2021-06-05 23:36:50,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 23:36:50,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:50,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:36:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:50,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566241375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:50,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:50,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 23:36:50,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795169805] [2021-06-05 23:36:50,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:36:50,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:50,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:36:50,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:36:50,655 INFO L87 Difference]: Start difference. First operand 2176 states and 7246 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-05 23:36:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:50,949 INFO L93 Difference]: Finished difference Result 3360 states and 10395 transitions. [2021-06-05 23:36:50,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:36:50,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 27 [2021-06-05 23:36:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:50,959 INFO L225 Difference]: With dead ends: 3360 [2021-06-05 23:36:50,959 INFO L226 Difference]: Without dead ends: 3360 [2021-06-05 23:36:50,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:36:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-06-05 23:36:50,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2143. [2021-06-05 23:36:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.316526610644258) internal successors, (7104), 2142 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7104 transitions. [2021-06-05 23:36:50,991 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7104 transitions. Word has length 27 [2021-06-05 23:36:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:50,991 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7104 transitions. [2021-06-05 23:36:50,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-05 23:36:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7104 transitions. [2021-06-05 23:36:50,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:50,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:50,994 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:51,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 23:36:51,194 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:51,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:51,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1160574596, now seen corresponding path program 13 times [2021-06-05 23:36:51,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:51,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957091559] [2021-06-05 23:36:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:51,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:51,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957091559] [2021-06-05 23:36:51,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957091559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:51,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516037677] [2021-06-05 23:36:51,230 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 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 [2021-06-05 23:36:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:51,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:51,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516037677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:51,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:51,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:36:51,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577544520] [2021-06-05 23:36:51,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:36:51,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:51,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:36:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:36:51,346 INFO L87 Difference]: Start difference. First operand 2143 states and 7104 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:52,112 INFO L93 Difference]: Finished difference Result 6236 states and 18781 transitions. [2021-06-05 23:36:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:36:52,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:52,122 INFO L225 Difference]: With dead ends: 6236 [2021-06-05 23:36:52,122 INFO L226 Difference]: Without dead ends: 6236 [2021-06-05 23:36:52,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 429.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:36:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-06-05 23:36:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 2154. [2021-06-05 23:36:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 2153 states have (on average 3.32559219693451) internal successors, (7160), 2153 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 7160 transitions. [2021-06-05 23:36:52,171 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 7160 transitions. Word has length 27 [2021-06-05 23:36:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:52,172 INFO L482 AbstractCegarLoop]: Abstraction has 2154 states and 7160 transitions. [2021-06-05 23:36:52,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 7160 transitions. [2021-06-05 23:36:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:52,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:52,175 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:52,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:52,377 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:52,377 INFO L82 PathProgramCache]: Analyzing trace with hash 966673928, now seen corresponding path program 14 times [2021-06-05 23:36:52,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:52,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322719214] [2021-06-05 23:36:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:52,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:52,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322719214] [2021-06-05 23:36:52,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322719214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:52,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333947666] [2021-06-05 23:36:52,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:36:52,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:52,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:52,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:52,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:52,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333947666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:52,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:52,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:36:52,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362113082] [2021-06-05 23:36:52,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:36:52,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:52,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:36:52,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:36:52,512 INFO L87 Difference]: Start difference. First operand 2154 states and 7160 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:53,295 INFO L93 Difference]: Finished difference Result 6112 states and 18481 transitions. [2021-06-05 23:36:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:36:53,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:53,304 INFO L225 Difference]: With dead ends: 6112 [2021-06-05 23:36:53,304 INFO L226 Difference]: Without dead ends: 6112 [2021-06-05 23:36:53,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:36:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-06-05 23:36:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 2135. [2021-06-05 23:36:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 3.3130271790065606) internal successors, (7070), 2134 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:53,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 7070 transitions. [2021-06-05 23:36:53,358 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 7070 transitions. Word has length 27 [2021-06-05 23:36:53,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:53,358 INFO L482 AbstractCegarLoop]: Abstraction has 2135 states and 7070 transitions. [2021-06-05 23:36:53,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:53,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 7070 transitions. [2021-06-05 23:36:53,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:53,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:53,362 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:53,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 23:36:53,562 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:53,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1779667311, now seen corresponding path program 7 times [2021-06-05 23:36:53,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:53,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759117443] [2021-06-05 23:36:53,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:53,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:53,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759117443] [2021-06-05 23:36:53,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759117443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:53,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200034917] [2021-06-05 23:36:53,593 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 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 [2021-06-05 23:36:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:53,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:36:53,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:53,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200034917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:53,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:53,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 23:36:53,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813048643] [2021-06-05 23:36:53,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:36:53,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:53,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:36:53,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:36:53,669 INFO L87 Difference]: Start difference. First operand 2135 states and 7070 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-06-05 23:36:53,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:53,869 INFO L93 Difference]: Finished difference Result 3444 states and 10974 transitions. [2021-06-05 23:36:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:36:53,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 27 [2021-06-05 23:36:53,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:53,873 INFO L225 Difference]: With dead ends: 3444 [2021-06-05 23:36:53,873 INFO L226 Difference]: Without dead ends: 3418 [2021-06-05 23:36:53,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:36:53,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-06-05 23:36:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 2593. [2021-06-05 23:36:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2592 states have (on average 3.3599537037037037) internal successors, (8709), 2592 states have internal predecessors, (8709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 8709 transitions. [2021-06-05 23:36:53,909 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 8709 transitions. Word has length 27 [2021-06-05 23:36:53,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:53,910 INFO L482 AbstractCegarLoop]: Abstraction has 2593 states and 8709 transitions. [2021-06-05 23:36:53,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-06-05 23:36:53,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 8709 transitions. [2021-06-05 23:36:53,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:53,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:53,913 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:54,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 23:36:54,114 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:54,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:54,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1360327411, now seen corresponding path program 8 times [2021-06-05 23:36:54,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:54,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443193260] [2021-06-05 23:36:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:54,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:54,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443193260] [2021-06-05 23:36:54,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443193260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:54,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722142391] [2021-06-05 23:36:54,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:36:54,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:54,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:36:54,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:54,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722142391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:54,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:54,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 23:36:54,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60247754] [2021-06-05 23:36:54,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:36:54,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:54,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:36:54,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:36:54,258 INFO L87 Difference]: Start difference. First operand 2593 states and 8709 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-06-05 23:36:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:54,440 INFO L93 Difference]: Finished difference Result 3554 states and 11351 transitions. [2021-06-05 23:36:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:36:54,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 27 [2021-06-05 23:36:54,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:54,445 INFO L225 Difference]: With dead ends: 3554 [2021-06-05 23:36:54,445 INFO L226 Difference]: Without dead ends: 3554 [2021-06-05 23:36:54,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:36:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2021-06-05 23:36:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 2611. [2021-06-05 23:36:54,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 3.3555555555555556) internal successors, (8758), 2610 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 8758 transitions. [2021-06-05 23:36:54,498 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 8758 transitions. Word has length 27 [2021-06-05 23:36:54,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:54,498 INFO L482 AbstractCegarLoop]: Abstraction has 2611 states and 8758 transitions. [2021-06-05 23:36:54,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-06-05 23:36:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 8758 transitions. [2021-06-05 23:36:54,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:54,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:54,503 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:54,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 23:36:54,711 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash -260473223, now seen corresponding path program 13 times [2021-06-05 23:36:54,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:54,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113950032] [2021-06-05 23:36:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:54,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:54,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113950032] [2021-06-05 23:36:54,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113950032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:54,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990520402] [2021-06-05 23:36:54,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:36:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:54,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:54,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:54,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990520402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:54,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:54,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 23:36:54,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500743989] [2021-06-05 23:36:54,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:36:54,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:54,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:36:54,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:36:54,865 INFO L87 Difference]: Start difference. First operand 2611 states and 8758 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:55,512 INFO L93 Difference]: Finished difference Result 8012 states and 25327 transitions. [2021-06-05 23:36:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:36:55,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:55,523 INFO L225 Difference]: With dead ends: 8012 [2021-06-05 23:36:55,524 INFO L226 Difference]: Without dead ends: 8012 [2021-06-05 23:36:55,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 355.4ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:36:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-06-05 23:36:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 3370. [2021-06-05 23:36:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 3.4579994063520334) internal successors, (11650), 3369 states have internal predecessors, (11650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 11650 transitions. [2021-06-05 23:36:55,650 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 11650 transitions. Word has length 27 [2021-06-05 23:36:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:55,650 INFO L482 AbstractCegarLoop]: Abstraction has 3370 states and 11650 transitions. [2021-06-05 23:36:55,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 11650 transitions. [2021-06-05 23:36:55,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:55,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:55,655 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:55,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 23:36:55,857 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash -454373891, now seen corresponding path program 14 times [2021-06-05 23:36:55,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:55,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118438595] [2021-06-05 23:36:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:55,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:55,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118438595] [2021-06-05 23:36:55,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118438595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:55,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615816728] [2021-06-05 23:36:55,890 INFO L93 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 [2021-06-05 23:36:55,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:55,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:55,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:55,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:55,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615816728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:55,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:55,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 23:36:55,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734981658] [2021-06-05 23:36:55,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:36:55,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:55,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:36:55,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:36:55,984 INFO L87 Difference]: Start difference. First operand 3370 states and 11650 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:56,585 INFO L93 Difference]: Finished difference Result 7985 states and 25267 transitions. [2021-06-05 23:36:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:36:56,586 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:56,597 INFO L225 Difference]: With dead ends: 7985 [2021-06-05 23:36:56,598 INFO L226 Difference]: Without dead ends: 7985 [2021-06-05 23:36:56,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 326.3ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:36:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7985 states. [2021-06-05 23:36:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7985 to 3369. [2021-06-05 23:36:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.4557600950118763) internal successors, (11639), 3368 states have internal predecessors, (11639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 11639 transitions. [2021-06-05 23:36:56,674 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 11639 transitions. Word has length 27 [2021-06-05 23:36:56,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:56,675 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 11639 transitions. [2021-06-05 23:36:56,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:56,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 11639 transitions. [2021-06-05 23:36:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:56,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:56,680 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:56,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:56,881 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1213889404, now seen corresponding path program 15 times [2021-06-05 23:36:56,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:56,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751209937] [2021-06-05 23:36:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:56,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:56,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751209937] [2021-06-05 23:36:56,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751209937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:56,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677000438] [2021-06-05 23:36:56,906 INFO L93 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 [2021-06-05 23:36:56,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:36:56,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:56,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:36:56,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:57,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677000438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:57,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:57,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 23:36:57,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859174293] [2021-06-05 23:36:57,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:36:57,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:57,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:36:57,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:36:57,003 INFO L87 Difference]: Start difference. First operand 3369 states and 11639 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:57,167 INFO L93 Difference]: Finished difference Result 5144 states and 16955 transitions. [2021-06-05 23:36:57,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:36:57,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:57,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:57,173 INFO L225 Difference]: With dead ends: 5144 [2021-06-05 23:36:57,173 INFO L226 Difference]: Without dead ends: 5133 [2021-06-05 23:36:57,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:36:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2021-06-05 23:36:57,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 3459. [2021-06-05 23:36:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 3.462695199537305) internal successors, (11974), 3458 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 11974 transitions. [2021-06-05 23:36:57,230 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 11974 transitions. Word has length 27 [2021-06-05 23:36:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:57,230 INFO L482 AbstractCegarLoop]: Abstraction has 3459 states and 11974 transitions. [2021-06-05 23:36:57,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 11974 transitions. [2021-06-05 23:36:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:57,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:57,237 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:57,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:57,445 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:57,446 INFO L82 PathProgramCache]: Analyzing trace with hash -479704520, now seen corresponding path program 16 times [2021-06-05 23:36:57,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:57,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328896615] [2021-06-05 23:36:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:57,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:57,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328896615] [2021-06-05 23:36:57,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328896615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:57,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025271366] [2021-06-05 23:36:57,473 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:36:57,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:36:57,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:57,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:36:57,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:57,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025271366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:57,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:57,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 23:36:57,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653771793] [2021-06-05 23:36:57,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:36:57,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:57,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:36:57,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:36:57,559 INFO L87 Difference]: Start difference. First operand 3459 states and 11974 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:57,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:57,746 INFO L93 Difference]: Finished difference Result 5400 states and 17684 transitions. [2021-06-05 23:36:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:36:57,746 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:57,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:57,756 INFO L225 Difference]: With dead ends: 5400 [2021-06-05 23:36:57,756 INFO L226 Difference]: Without dead ends: 5400 [2021-06-05 23:36:57,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:36:57,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-06-05 23:36:57,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 3354. [2021-06-05 23:36:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 3.4446764091858038) internal successors, (11550), 3353 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 11550 transitions. [2021-06-05 23:36:57,826 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 11550 transitions. Word has length 27 [2021-06-05 23:36:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:57,826 INFO L482 AbstractCegarLoop]: Abstraction has 3354 states and 11550 transitions. [2021-06-05 23:36:57,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 11550 transitions. [2021-06-05 23:36:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:57,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:57,833 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:58,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:58,056 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:58,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:58,057 INFO L82 PathProgramCache]: Analyzing trace with hash -826283657, now seen corresponding path program 17 times [2021-06-05 23:36:58,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:58,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068030791] [2021-06-05 23:36:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:58,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:58,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068030791] [2021-06-05 23:36:58,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068030791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:58,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901794206] [2021-06-05 23:36:58,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:36:58,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:36:58,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:58,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:58,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:58,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901794206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:58,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:58,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 23:36:58,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26889719] [2021-06-05 23:36:58,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:36:58,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:58,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:36:58,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:36:58,203 INFO L87 Difference]: Start difference. First operand 3354 states and 11550 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:58,709 INFO L93 Difference]: Finished difference Result 7362 states and 23005 transitions. [2021-06-05 23:36:58,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:36:58,709 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:58,721 INFO L225 Difference]: With dead ends: 7362 [2021-06-05 23:36:58,721 INFO L226 Difference]: Without dead ends: 7362 [2021-06-05 23:36:58,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:36:58,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2021-06-05 23:36:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 3368. [2021-06-05 23:36:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 3.4460944460944463) internal successors, (11603), 3367 states have internal predecessors, (11603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 11603 transitions. [2021-06-05 23:36:58,798 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 11603 transitions. Word has length 27 [2021-06-05 23:36:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:58,799 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 11603 transitions. [2021-06-05 23:36:58,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 11603 transitions. [2021-06-05 23:36:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:58,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:58,805 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:59,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:59,027 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:59,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1015501955, now seen corresponding path program 18 times [2021-06-05 23:36:59,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:59,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320870130] [2021-06-05 23:36:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:59,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:59,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320870130] [2021-06-05 23:36:59,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320870130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:59,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270815704] [2021-06-05 23:36:59,075 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 [2021-06-05 23:36:59,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:36:59,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:59,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:36:59,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:59,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270815704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:59,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:59,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 23:36:59,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851093970] [2021-06-05 23:36:59,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:36:59,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:59,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:36:59,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:36:59,161 INFO L87 Difference]: Start difference. First operand 3368 states and 11603 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:59,643 INFO L93 Difference]: Finished difference Result 7148 states and 22493 transitions. [2021-06-05 23:36:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:36:59,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:36:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:59,655 INFO L225 Difference]: With dead ends: 7148 [2021-06-05 23:36:59,656 INFO L226 Difference]: Without dead ends: 7140 [2021-06-05 23:36:59,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:36:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-06-05 23:36:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 3360. [2021-06-05 23:36:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.443584400119083) internal successors, (11567), 3359 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 11567 transitions. [2021-06-05 23:36:59,742 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 11567 transitions. Word has length 27 [2021-06-05 23:36:59,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:59,742 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 11567 transitions. [2021-06-05 23:36:59,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 11567 transitions. [2021-06-05 23:36:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:36:59,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:59,747 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:59,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 23:36:59,947 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:59,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:59,948 INFO L82 PathProgramCache]: Analyzing trace with hash 374019261, now seen corresponding path program 19 times [2021-06-05 23:36:59,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:59,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619974821] [2021-06-05 23:36:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:59,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:59,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619974821] [2021-06-05 23:36:59,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619974821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:59,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989866029] [2021-06-05 23:36:59,983 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 [2021-06-05 23:37:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:00,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:37:00,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:00,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989866029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:00,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:00,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 23:37:00,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281744390] [2021-06-05 23:37:00,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:37:00,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:00,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:37:00,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:37:00,076 INFO L87 Difference]: Start difference. First operand 3360 states and 11567 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:00,583 INFO L93 Difference]: Finished difference Result 7312 states and 22866 transitions. [2021-06-05 23:37:00,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:37:00,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:37:00,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:00,607 INFO L225 Difference]: With dead ends: 7312 [2021-06-05 23:37:00,607 INFO L226 Difference]: Without dead ends: 7312 [2021-06-05 23:37:00,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:37:00,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7312 states. [2021-06-05 23:37:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7312 to 3366. [2021-06-05 23:37:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 3.444873699851412) internal successors, (11592), 3365 states have internal predecessors, (11592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 11592 transitions. [2021-06-05 23:37:00,678 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 11592 transitions. Word has length 27 [2021-06-05 23:37:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:00,678 INFO L482 AbstractCegarLoop]: Abstraction has 3366 states and 11592 transitions. [2021-06-05 23:37:00,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 11592 transitions. [2021-06-05 23:37:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:00,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:00,683 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:00,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 23:37:00,884 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:00,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:00,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2138298565, now seen corresponding path program 20 times [2021-06-05 23:37:00,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:00,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336604788] [2021-06-05 23:37:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:00,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:00,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336604788] [2021-06-05 23:37:00,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336604788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:00,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359315390] [2021-06-05 23:37:00,916 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 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 [2021-06-05 23:37:00,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:37:00,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:00,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:37:00,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:01,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359315390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:01,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:01,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 23:37:01,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521892926] [2021-06-05 23:37:01,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:37:01,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:01,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:37:01,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:37:01,064 INFO L87 Difference]: Start difference. First operand 3366 states and 11592 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:01,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:01,511 INFO L93 Difference]: Finished difference Result 7159 states and 22507 transitions. [2021-06-05 23:37:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:37:01,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:37:01,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:01,521 INFO L225 Difference]: With dead ends: 7159 [2021-06-05 23:37:01,521 INFO L226 Difference]: Without dead ends: 7151 [2021-06-05 23:37:01,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:37:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-06-05 23:37:01,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 3360. [2021-06-05 23:37:01,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.443584400119083) internal successors, (11567), 3359 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:01,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 11567 transitions. [2021-06-05 23:37:01,586 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 11567 transitions. Word has length 27 [2021-06-05 23:37:01,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:01,586 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 11567 transitions. [2021-06-05 23:37:01,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:01,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 11567 transitions. [2021-06-05 23:37:01,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:01,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:01,590 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:01,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 23:37:01,791 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:01,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:01,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1533405914, now seen corresponding path program 21 times [2021-06-05 23:37:01,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:01,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341706577] [2021-06-05 23:37:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:01,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:01,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341706577] [2021-06-05 23:37:01,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341706577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:01,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513185367] [2021-06-05 23:37:01,830 INFO L93 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 [2021-06-05 23:37:01,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:37:01,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:01,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:37:01,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:01,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513185367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:01,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:01,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 23:37:01,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861927142] [2021-06-05 23:37:01,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:37:01,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:01,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:37:01,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:37:01,929 INFO L87 Difference]: Start difference. First operand 3360 states and 11567 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-06-05 23:37:02,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:02,109 INFO L93 Difference]: Finished difference Result 5123 states and 16923 transitions. [2021-06-05 23:37:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:37:02,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 27 [2021-06-05 23:37:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:02,116 INFO L225 Difference]: With dead ends: 5123 [2021-06-05 23:37:02,117 INFO L226 Difference]: Without dead ends: 5123 [2021-06-05 23:37:02,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:37:02,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5123 states. [2021-06-05 23:37:02,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5123 to 4026. [2021-06-05 23:37:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 3.443726708074534) internal successors, (13861), 4025 states have internal predecessors, (13861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:02,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 13861 transitions. [2021-06-05 23:37:02,200 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 13861 transitions. Word has length 27 [2021-06-05 23:37:02,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:02,200 INFO L482 AbstractCegarLoop]: Abstraction has 4026 states and 13861 transitions. [2021-06-05 23:37:02,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-06-05 23:37:02,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 13861 transitions. [2021-06-05 23:37:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:02,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:02,206 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:02,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:02,407 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:02,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1095030085, now seen corresponding path program 22 times [2021-06-05 23:37:02,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:02,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914781104] [2021-06-05 23:37:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:02,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:02,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914781104] [2021-06-05 23:37:02,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914781104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:02,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083482675] [2021-06-05 23:37:02,460 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:37:02,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:37:02,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:02,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:37:02,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:02,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083482675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:02,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:02,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:37:02,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549506192] [2021-06-05 23:37:02,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:37:02,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:02,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:37:02,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:37:02,547 INFO L87 Difference]: Start difference. First operand 4026 states and 13861 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 23:37:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:03,056 INFO L93 Difference]: Finished difference Result 7661 states and 24465 transitions. [2021-06-05 23:37:03,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:37:03,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-06-05 23:37:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:03,067 INFO L225 Difference]: With dead ends: 7661 [2021-06-05 23:37:03,067 INFO L226 Difference]: Without dead ends: 7661 [2021-06-05 23:37:03,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:37:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7661 states. [2021-06-05 23:37:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7661 to 4388. [2021-06-05 23:37:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 3.4410759060861635) internal successors, (15096), 4387 states have internal predecessors, (15096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 15096 transitions. [2021-06-05 23:37:03,143 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 15096 transitions. Word has length 27 [2021-06-05 23:37:03,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:03,143 INFO L482 AbstractCegarLoop]: Abstraction has 4388 states and 15096 transitions. [2021-06-05 23:37:03,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 23:37:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 15096 transitions. [2021-06-05 23:37:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:03,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:03,148 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:03,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 23:37:03,349 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:03,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1284248383, now seen corresponding path program 23 times [2021-06-05 23:37:03,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:03,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164541380] [2021-06-05 23:37:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:03,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:03,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164541380] [2021-06-05 23:37:03,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164541380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:03,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497420040] [2021-06-05 23:37:03,383 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 [2021-06-05 23:37:03,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:37:03,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:03,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:37:03,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:03,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497420040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:03,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:03,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:37:03,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254435896] [2021-06-05 23:37:03,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:37:03,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:03,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:37:03,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:37:03,464 INFO L87 Difference]: Start difference. First operand 4388 states and 15096 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 23:37:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:03,999 INFO L93 Difference]: Finished difference Result 7294 states and 23512 transitions. [2021-06-05 23:37:03,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:37:03,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-06-05 23:37:03,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:04,009 INFO L225 Difference]: With dead ends: 7294 [2021-06-05 23:37:04,009 INFO L226 Difference]: Without dead ends: 7286 [2021-06-05 23:37:04,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:37:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7286 states. [2021-06-05 23:37:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7286 to 4380. [2021-06-05 23:37:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.4405115323133137) internal successors, (15066), 4379 states have internal predecessors, (15066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 15066 transitions. [2021-06-05 23:37:04,091 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 15066 transitions. Word has length 27 [2021-06-05 23:37:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:04,091 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 15066 transitions. [2021-06-05 23:37:04,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 23:37:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 15066 transitions. [2021-06-05 23:37:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:04,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:04,097 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:04,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 23:37:04,297 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:04,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1799080439, now seen corresponding path program 9 times [2021-06-05 23:37:04,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:04,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832343766] [2021-06-05 23:37:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:04,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:04,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832343766] [2021-06-05 23:37:04,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832343766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:04,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257579325] [2021-06-05 23:37:04,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:37:04,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:37:04,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:04,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:37:04,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:04,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257579325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:04,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:04,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 23:37:04,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468395873] [2021-06-05 23:37:04,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:37:04,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:04,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:37:04,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:37:04,402 INFO L87 Difference]: Start difference. First operand 4380 states and 15066 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-06-05 23:37:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:04,598 INFO L93 Difference]: Finished difference Result 5160 states and 17337 transitions. [2021-06-05 23:37:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:37:04,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 27 [2021-06-05 23:37:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:04,605 INFO L225 Difference]: With dead ends: 5160 [2021-06-05 23:37:04,605 INFO L226 Difference]: Without dead ends: 5160 [2021-06-05 23:37:04,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:37:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2021-06-05 23:37:04,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 4419. [2021-06-05 23:37:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4419 states, 4418 states have (on average 3.438886373924853) internal successors, (15193), 4418 states have internal predecessors, (15193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 15193 transitions. [2021-06-05 23:37:04,665 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 15193 transitions. Word has length 27 [2021-06-05 23:37:04,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:04,665 INFO L482 AbstractCegarLoop]: Abstraction has 4419 states and 15193 transitions. [2021-06-05 23:37:04,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-06-05 23:37:04,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 15193 transitions. [2021-06-05 23:37:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:04,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:04,670 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:04,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:04,871 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:04,871 INFO L82 PathProgramCache]: Analyzing trace with hash -640866123, now seen corresponding path program 24 times [2021-06-05 23:37:04,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:04,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380586287] [2021-06-05 23:37:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:04,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:04,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380586287] [2021-06-05 23:37:04,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380586287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:04,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252278152] [2021-06-05 23:37:04,904 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 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 [2021-06-05 23:37:04,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:37:04,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:04,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:37:04,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:04,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252278152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:04,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:04,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:37:04,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059532633] [2021-06-05 23:37:04,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:37:04,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:04,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:37:04,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:37:04,998 INFO L87 Difference]: Start difference. First operand 4419 states and 15193 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 23:37:05,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:05,442 INFO L93 Difference]: Finished difference Result 7167 states and 23253 transitions. [2021-06-05 23:37:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:37:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-06-05 23:37:05,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:05,456 INFO L225 Difference]: With dead ends: 7167 [2021-06-05 23:37:05,456 INFO L226 Difference]: Without dead ends: 7135 [2021-06-05 23:37:05,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:37:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7135 states. [2021-06-05 23:37:05,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7135 to 4447. [2021-06-05 23:37:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4446 states have (on average 3.435672514619883) internal successors, (15275), 4446 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:05,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 15275 transitions. [2021-06-05 23:37:05,547 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 15275 transitions. Word has length 27 [2021-06-05 23:37:05,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:05,547 INFO L482 AbstractCegarLoop]: Abstraction has 4447 states and 15275 transitions. [2021-06-05 23:37:05,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 23:37:05,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 15275 transitions. [2021-06-05 23:37:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:05,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:05,553 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:05,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 23:37:05,754 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:05,754 INFO L82 PathProgramCache]: Analyzing trace with hash -328510151, now seen corresponding path program 25 times [2021-06-05 23:37:05,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:05,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831348727] [2021-06-05 23:37:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:05,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:05,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831348727] [2021-06-05 23:37:05,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831348727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:05,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156804990] [2021-06-05 23:37:05,785 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 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 [2021-06-05 23:37:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:05,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:37:05,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:05,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156804990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:05,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:05,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:37:05,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421832349] [2021-06-05 23:37:05,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:37:05,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:05,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:37:05,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:37:05,890 INFO L87 Difference]: Start difference. First operand 4447 states and 15275 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:06,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:06,545 INFO L93 Difference]: Finished difference Result 7634 states and 24450 transitions. [2021-06-05 23:37:06,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:37:06,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:37:06,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:06,558 INFO L225 Difference]: With dead ends: 7634 [2021-06-05 23:37:06,558 INFO L226 Difference]: Without dead ends: 7634 [2021-06-05 23:37:06,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:37:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7634 states. [2021-06-05 23:37:06,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7634 to 4681. [2021-06-05 23:37:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 3.4264957264957263) internal successors, (16036), 4680 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 16036 transitions. [2021-06-05 23:37:06,672 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 16036 transitions. Word has length 27 [2021-06-05 23:37:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:06,672 INFO L482 AbstractCegarLoop]: Abstraction has 4681 states and 16036 transitions. [2021-06-05 23:37:06,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 16036 transitions. [2021-06-05 23:37:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:06,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:06,678 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:06,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:06,879 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:06,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:06,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1454139319, now seen corresponding path program 26 times [2021-06-05 23:37:06,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:06,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137547970] [2021-06-05 23:37:06,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:06,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:06,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137547970] [2021-06-05 23:37:06,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137547970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:06,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906507713] [2021-06-05 23:37:06,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:37:06,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:37:06,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:06,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:37:06,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:07,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906507713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:07,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:07,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:37:07,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524565666] [2021-06-05 23:37:07,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:37:07,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:07,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:37:07,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:37:07,052 INFO L87 Difference]: Start difference. First operand 4681 states and 16036 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:07,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:07,571 INFO L93 Difference]: Finished difference Result 7391 states and 23828 transitions. [2021-06-05 23:37:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:37:07,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:37:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:07,582 INFO L225 Difference]: With dead ends: 7391 [2021-06-05 23:37:07,582 INFO L226 Difference]: Without dead ends: 7383 [2021-06-05 23:37:07,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:37:07,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2021-06-05 23:37:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 4675. [2021-06-05 23:37:07,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4675 states, 4674 states have (on average 3.4251176722293537) internal successors, (16009), 4674 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 16009 transitions. [2021-06-05 23:37:07,672 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 16009 transitions. Word has length 27 [2021-06-05 23:37:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:07,672 INFO L482 AbstractCegarLoop]: Abstraction has 4675 states and 16009 transitions. [2021-06-05 23:37:07,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 16009 transitions. [2021-06-05 23:37:07,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:07,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:07,679 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:07,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 23:37:07,893 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:07,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:07,893 INFO L82 PathProgramCache]: Analyzing trace with hash 609167867, now seen corresponding path program 27 times [2021-06-05 23:37:07,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:07,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700475233] [2021-06-05 23:37:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:07,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:07,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700475233] [2021-06-05 23:37:07,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700475233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:07,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727929575] [2021-06-05 23:37:07,924 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 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 [2021-06-05 23:37:07,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:37:07,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:07,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:37:07,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:08,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727929575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:08,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:08,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:37:08,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026064719] [2021-06-05 23:37:08,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:37:08,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:08,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:37:08,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:37:08,015 INFO L87 Difference]: Start difference. First operand 4675 states and 16009 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:08,487 INFO L93 Difference]: Finished difference Result 7057 states and 23013 transitions. [2021-06-05 23:37:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:37:08,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:37:08,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:08,498 INFO L225 Difference]: With dead ends: 7057 [2021-06-05 23:37:08,498 INFO L226 Difference]: Without dead ends: 7025 [2021-06-05 23:37:08,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:37:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7025 states. [2021-06-05 23:37:08,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7025 to 4719. [2021-06-05 23:37:08,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 4718 states have (on average 3.42030521407376) internal successors, (16137), 4718 states have internal predecessors, (16137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 16137 transitions. [2021-06-05 23:37:08,587 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 16137 transitions. Word has length 27 [2021-06-05 23:37:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:08,587 INFO L482 AbstractCegarLoop]: Abstraction has 4719 states and 16137 transitions. [2021-06-05 23:37:08,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 16137 transitions. [2021-06-05 23:37:08,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:08,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:08,593 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:08,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 23:37:08,794 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:08,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:08,794 INFO L82 PathProgramCache]: Analyzing trace with hash 273764453, now seen corresponding path program 28 times [2021-06-05 23:37:08,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:08,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341873113] [2021-06-05 23:37:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:08,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:08,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341873113] [2021-06-05 23:37:08,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341873113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:08,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265292257] [2021-06-05 23:37:08,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:37:08,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:37:08,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:08,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:37:08,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:08,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265292257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:08,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:08,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:37:08,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402482350] [2021-06-05 23:37:08,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:37:08,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:08,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:37:08,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:37:08,940 INFO L87 Difference]: Start difference. First operand 4719 states and 16137 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:09,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:09,276 INFO L93 Difference]: Finished difference Result 6384 states and 21138 transitions. [2021-06-05 23:37:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:37:09,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:37:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:09,286 INFO L225 Difference]: With dead ends: 6384 [2021-06-05 23:37:09,286 INFO L226 Difference]: Without dead ends: 6384 [2021-06-05 23:37:09,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:37:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-06-05 23:37:09,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 4849. [2021-06-05 23:37:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4848 states have (on average 3.4096534653465347) internal successors, (16530), 4848 states have internal predecessors, (16530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 16530 transitions. [2021-06-05 23:37:09,370 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 16530 transitions. Word has length 27 [2021-06-05 23:37:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:09,370 INFO L482 AbstractCegarLoop]: Abstraction has 4849 states and 16530 transitions. [2021-06-05 23:37:09,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 16530 transitions. [2021-06-05 23:37:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:09,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:09,378 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:09,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:09,607 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:09,608 INFO L82 PathProgramCache]: Analyzing trace with hash 327227152, now seen corresponding path program 15 times [2021-06-05 23:37:09,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:09,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073430931] [2021-06-05 23:37:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:09,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:09,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073430931] [2021-06-05 23:37:09,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073430931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:09,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645606029] [2021-06-05 23:37:09,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:37:09,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:37:09,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:37:09,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:09,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645606029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:09,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:09,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 23:37:09,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073747196] [2021-06-05 23:37:09,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:37:09,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:09,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:37:09,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:37:09,716 INFO L87 Difference]: Start difference. First operand 4849 states and 16530 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-06-05 23:37:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:10,063 INFO L93 Difference]: Finished difference Result 6692 states and 22004 transitions. [2021-06-05 23:37:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:37:10,063 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 27 [2021-06-05 23:37:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:10,074 INFO L225 Difference]: With dead ends: 6692 [2021-06-05 23:37:10,074 INFO L226 Difference]: Without dead ends: 6692 [2021-06-05 23:37:10,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:37:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6692 states. [2021-06-05 23:37:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6692 to 4967. [2021-06-05 23:37:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4967 states, 4966 states have (on average 3.3987112364075713) internal successors, (16878), 4966 states have internal predecessors, (16878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4967 states to 4967 states and 16878 transitions. [2021-06-05 23:37:10,153 INFO L78 Accepts]: Start accepts. Automaton has 4967 states and 16878 transitions. Word has length 27 [2021-06-05 23:37:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:10,153 INFO L482 AbstractCegarLoop]: Abstraction has 4967 states and 16878 transitions. [2021-06-05 23:37:10,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-06-05 23:37:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4967 states and 16878 transitions. [2021-06-05 23:37:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:10,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:10,159 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:10,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 23:37:10,361 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash 921828852, now seen corresponding path program 16 times [2021-06-05 23:37:10,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:10,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855408739] [2021-06-05 23:37:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:10,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:10,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855408739] [2021-06-05 23:37:10,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855408739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:10,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602272399] [2021-06-05 23:37:10,389 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 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 [2021-06-05 23:37:10,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:37:10,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:10,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:37:10,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:10,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602272399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:10,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:10,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 23:37:10,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874044405] [2021-06-05 23:37:10,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:37:10,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:10,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:37:10,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:37:10,457 INFO L87 Difference]: Start difference. First operand 4967 states and 16878 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-06-05 23:37:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:10,736 INFO L93 Difference]: Finished difference Result 6568 states and 21695 transitions. [2021-06-05 23:37:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:37:10,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 27 [2021-06-05 23:37:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:10,746 INFO L225 Difference]: With dead ends: 6568 [2021-06-05 23:37:10,746 INFO L226 Difference]: Without dead ends: 6552 [2021-06-05 23:37:10,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:37:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2021-06-05 23:37:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 5075. [2021-06-05 23:37:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 5074 states have (on average 3.3866771777690183) internal successors, (17184), 5074 states have internal predecessors, (17184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 17184 transitions. [2021-06-05 23:37:10,829 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 17184 transitions. Word has length 27 [2021-06-05 23:37:10,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:10,829 INFO L482 AbstractCegarLoop]: Abstraction has 5075 states and 17184 transitions. [2021-06-05 23:37:10,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-06-05 23:37:10,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 17184 transitions. [2021-06-05 23:37:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:37:10,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:10,836 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:11,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:11,036 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:11,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:11,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1636343253, now seen corresponding path program 10 times [2021-06-05 23:37:11,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:11,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816819208] [2021-06-05 23:37:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:11,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:11,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816819208] [2021-06-05 23:37:11,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816819208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:11,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162420158] [2021-06-05 23:37:11,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:37:11,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:37:11,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:11,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:37:11,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:11,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162420158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:11,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:11,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 23:37:11,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395998790] [2021-06-05 23:37:11,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:37:11,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:11,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:37:11,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:37:11,140 INFO L87 Difference]: Start difference. First operand 5075 states and 17184 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-05 23:37:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:11,347 INFO L93 Difference]: Finished difference Result 5593 states and 18688 transitions. [2021-06-05 23:37:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:37:11,348 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 27 [2021-06-05 23:37:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:11,356 INFO L225 Difference]: With dead ends: 5593 [2021-06-05 23:37:11,356 INFO L226 Difference]: Without dead ends: 5593 [2021-06-05 23:37:11,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:37:11,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2021-06-05 23:37:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 4995. [2021-06-05 23:37:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4995 states, 4994 states have (on average 3.383660392470965) internal successors, (16898), 4994 states have internal predecessors, (16898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4995 states to 4995 states and 16898 transitions. [2021-06-05 23:37:11,466 INFO L78 Accepts]: Start accepts. Automaton has 4995 states and 16898 transitions. Word has length 27 [2021-06-05 23:37:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:11,466 INFO L482 AbstractCegarLoop]: Abstraction has 4995 states and 16898 transitions. [2021-06-05 23:37:11,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-05 23:37:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4995 states and 16898 transitions. [2021-06-05 23:37:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:11,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:11,472 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:11,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 23:37:11,673 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:11,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1236304047, now seen corresponding path program 29 times [2021-06-05 23:37:11,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:11,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282700031] [2021-06-05 23:37:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:11,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:11,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282700031] [2021-06-05 23:37:11,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282700031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:11,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119480735] [2021-06-05 23:37:11,805 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 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 [2021-06-05 23:37:11,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:37:11,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:11,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:37:11,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:11,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:37:11,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:11,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:11,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:11,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 23:37:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:12,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119480735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:12,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:12,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 23:37:12,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731595051] [2021-06-05 23:37:12,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:37:12,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:12,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:37:12,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:37:12,018 INFO L87 Difference]: Start difference. First operand 4995 states and 16898 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:12,197 INFO L93 Difference]: Finished difference Result 5811 states and 19365 transitions. [2021-06-05 23:37:12,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:37:12,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:12,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:12,210 INFO L225 Difference]: With dead ends: 5811 [2021-06-05 23:37:12,210 INFO L226 Difference]: Without dead ends: 5742 [2021-06-05 23:37:12,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:37:12,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5742 states. [2021-06-05 23:37:12,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5742 to 5187. [2021-06-05 23:37:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5187 states, 5186 states have (on average 3.3814114924797534) internal successors, (17536), 5186 states have internal predecessors, (17536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5187 states to 5187 states and 17536 transitions. [2021-06-05 23:37:12,317 INFO L78 Accepts]: Start accepts. Automaton has 5187 states and 17536 transitions. Word has length 30 [2021-06-05 23:37:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:12,317 INFO L482 AbstractCegarLoop]: Abstraction has 5187 states and 17536 transitions. [2021-06-05 23:37:12,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 5187 states and 17536 transitions. [2021-06-05 23:37:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:12,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:12,326 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:12,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 23:37:12,549 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:12,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:12,549 INFO L82 PathProgramCache]: Analyzing trace with hash 745415110, now seen corresponding path program 11 times [2021-06-05 23:37:12,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:12,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127977929] [2021-06-05 23:37:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:12,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:12,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127977929] [2021-06-05 23:37:12,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127977929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:12,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673728633] [2021-06-05 23:37:12,960 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 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 [2021-06-05 23:37:12,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:37:12,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:12,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:12,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:13,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:13,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:37:13,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:37:13,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:13,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:13,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:13,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:37:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:13,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673728633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:13,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:13,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 23:37:13,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960739837] [2021-06-05 23:37:13,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:37:13,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:13,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:37:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:37:13,279 INFO L87 Difference]: Start difference. First operand 5187 states and 17536 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:14,617 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 23:37:15,435 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-05 23:37:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:16,276 INFO L93 Difference]: Finished difference Result 8307 states and 27178 transitions. [2021-06-05 23:37:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:37:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:16,289 INFO L225 Difference]: With dead ends: 8307 [2021-06-05 23:37:16,289 INFO L226 Difference]: Without dead ends: 8281 [2021-06-05 23:37:16,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2475.8ms TimeCoverageRelationStatistics Valid=416, Invalid=3006, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:37:16,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8281 states. [2021-06-05 23:37:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8281 to 5254. [2021-06-05 23:37:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5254 states, 5253 states have (on average 3.379211878926328) internal successors, (17751), 5253 states have internal predecessors, (17751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 17751 transitions. [2021-06-05 23:37:16,391 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 17751 transitions. Word has length 30 [2021-06-05 23:37:16,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:16,391 INFO L482 AbstractCegarLoop]: Abstraction has 5254 states and 17751 transitions. [2021-06-05 23:37:16,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 17751 transitions. [2021-06-05 23:37:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:16,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:16,397 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:16,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:16,598 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:16,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1233935798, now seen corresponding path program 12 times [2021-06-05 23:37:16,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:16,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177096795] [2021-06-05 23:37:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:16,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:16,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177096795] [2021-06-05 23:37:16,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177096795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:16,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37390378] [2021-06-05 23:37:16,797 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 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 [2021-06-05 23:37:16,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:37:16,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:37:16,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:17,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:17,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:37:17,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:37:17,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:17,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:17,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:43 [2021-06-05 23:37:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:17,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37390378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:17,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:17,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-06-05 23:37:17,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093192879] [2021-06-05 23:37:17,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:37:17,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:17,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:37:17,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:37:17,346 INFO L87 Difference]: Start difference. First operand 5254 states and 17751 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:20,185 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-05 23:37:21,219 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-06-05 23:37:21,373 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-06-05 23:37:21,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:21,379 INFO L93 Difference]: Finished difference Result 9505 states and 30456 transitions. [2021-06-05 23:37:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:37:21,379 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:21,392 INFO L225 Difference]: With dead ends: 9505 [2021-06-05 23:37:21,393 INFO L226 Difference]: Without dead ends: 9445 [2021-06-05 23:37:21,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 3238.5ms TimeCoverageRelationStatistics Valid=674, Invalid=5332, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 23:37:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2021-06-05 23:37:21,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 5277. [2021-06-05 23:37:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 3.3788855193328278) internal successors, (17827), 5276 states have internal predecessors, (17827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 17827 transitions. [2021-06-05 23:37:21,492 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 17827 transitions. Word has length 30 [2021-06-05 23:37:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:21,492 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 17827 transitions. [2021-06-05 23:37:21,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 17827 transitions. [2021-06-05 23:37:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:21,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:21,499 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:21,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:21,699 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:21,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1698612030, now seen corresponding path program 13 times [2021-06-05 23:37:21,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:21,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70932690] [2021-06-05 23:37:21,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:22,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:22,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70932690] [2021-06-05 23:37:22,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70932690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:22,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501986675] [2021-06-05 23:37:22,013 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 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 [2021-06-05 23:37:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:22,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:37:22,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:22,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:22,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:37:22,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:37:22,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:22,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:22,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:22,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:37:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:22,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501986675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:22,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:22,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:37:22,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751707901] [2021-06-05 23:37:22,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:37:22,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:22,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:37:22,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:37:22,308 INFO L87 Difference]: Start difference. First operand 5277 states and 17827 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:24,385 INFO L93 Difference]: Finished difference Result 6564 states and 21312 transitions. [2021-06-05 23:37:24,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:37:24,385 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:24,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:24,395 INFO L225 Difference]: With dead ends: 6564 [2021-06-05 23:37:24,395 INFO L226 Difference]: Without dead ends: 6534 [2021-06-05 23:37:24,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1749.0ms TimeCoverageRelationStatistics Valid=385, Invalid=2371, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:37:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2021-06-05 23:37:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5285. [2021-06-05 23:37:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 5284 states have (on average 3.3783118849356546) internal successors, (17851), 5284 states have internal predecessors, (17851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 17851 transitions. [2021-06-05 23:37:24,479 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 17851 transitions. Word has length 30 [2021-06-05 23:37:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:24,479 INFO L482 AbstractCegarLoop]: Abstraction has 5285 states and 17851 transitions. [2021-06-05 23:37:24,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:24,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 17851 transitions. [2021-06-05 23:37:24,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:24,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:24,485 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:24,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 23:37:24,686 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:24,686 INFO L82 PathProgramCache]: Analyzing trace with hash -721957958, now seen corresponding path program 14 times [2021-06-05 23:37:24,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:24,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222502763] [2021-06-05 23:37:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:25,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:25,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222502763] [2021-06-05 23:37:25,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222502763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:25,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490963382] [2021-06-05 23:37:25,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:37:25,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:37:25,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:25,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:25,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:25,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:37:25,224 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:37:25,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:25,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:25,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:37:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:25,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490963382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:25,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:25,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 23:37:25,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329659243] [2021-06-05 23:37:25,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:37:25,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:25,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:37:25,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:37:25,303 INFO L87 Difference]: Start difference. First operand 5285 states and 17851 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:28,429 INFO L93 Difference]: Finished difference Result 6989 states and 22642 transitions. [2021-06-05 23:37:28,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:37:28,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:28,440 INFO L225 Difference]: With dead ends: 6989 [2021-06-05 23:37:28,440 INFO L226 Difference]: Without dead ends: 6943 [2021-06-05 23:37:28,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2580.8ms TimeCoverageRelationStatistics Valid=557, Invalid=3999, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:37:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6943 states. [2021-06-05 23:37:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6943 to 5338. [2021-06-05 23:37:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.3814877271875585) internal successors, (18047), 5337 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 18047 transitions. [2021-06-05 23:37:28,528 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 18047 transitions. Word has length 30 [2021-06-05 23:37:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:28,528 INFO L482 AbstractCegarLoop]: Abstraction has 5338 states and 18047 transitions. [2021-06-05 23:37:28,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 18047 transitions. [2021-06-05 23:37:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:28,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:28,535 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:28,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:28,735 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:28,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1665366353, now seen corresponding path program 17 times [2021-06-05 23:37:28,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:28,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848246290] [2021-06-05 23:37:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:29,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:29,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848246290] [2021-06-05 23:37:29,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848246290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:29,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813546204] [2021-06-05 23:37:29,237 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 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 [2021-06-05 23:37:29,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:37:29,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:29,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:37:29,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:29,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:29,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:29,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:37:29,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:37:29,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:37:29,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:29,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:29,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:29,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:37:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:29,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813546204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:29,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:29,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 23:37:29,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104902333] [2021-06-05 23:37:29,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:37:29,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:37:29,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:37:29,590 INFO L87 Difference]: Start difference. First operand 5338 states and 18047 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:31,896 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 23:37:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:33,528 INFO L93 Difference]: Finished difference Result 7096 states and 23312 transitions. [2021-06-05 23:37:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:37:33,528 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:33,539 INFO L225 Difference]: With dead ends: 7096 [2021-06-05 23:37:33,539 INFO L226 Difference]: Without dead ends: 7070 [2021-06-05 23:37:33,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 3342.3ms TimeCoverageRelationStatistics Valid=537, Invalid=4293, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:37:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7070 states. [2021-06-05 23:37:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7070 to 5425. [2021-06-05 23:37:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 5424 states have (on average 3.3737094395280236) internal successors, (18299), 5424 states have internal predecessors, (18299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 18299 transitions. [2021-06-05 23:37:33,618 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 18299 transitions. Word has length 30 [2021-06-05 23:37:33,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:33,619 INFO L482 AbstractCegarLoop]: Abstraction has 5425 states and 18299 transitions. [2021-06-05 23:37:33,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:33,619 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 18299 transitions. [2021-06-05 23:37:33,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:33,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:33,625 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:33,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:33,825 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:33,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1512137484, now seen corresponding path program 15 times [2021-06-05 23:37:33,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:33,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908669973] [2021-06-05 23:37:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:34,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908669973] [2021-06-05 23:37:34,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908669973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758233678] [2021-06-05 23:37:34,165 INFO L93 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 [2021-06-05 23:37:34,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:37:34,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:34,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:34,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:34,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:37:34,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:34,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:37:34,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:34,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:34,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:34,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-05 23:37:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:34,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758233678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:34,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:34,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:37:34,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279093032] [2021-06-05 23:37:34,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:37:34,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:34,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:37:34,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:37:34,524 INFO L87 Difference]: Start difference. First operand 5425 states and 18299 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:36,461 INFO L93 Difference]: Finished difference Result 6660 states and 21646 transitions. [2021-06-05 23:37:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:37:36,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:36,472 INFO L225 Difference]: With dead ends: 6660 [2021-06-05 23:37:36,472 INFO L226 Difference]: Without dead ends: 6630 [2021-06-05 23:37:36,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1630.8ms TimeCoverageRelationStatistics Valid=349, Invalid=2101, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:37:36,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2021-06-05 23:37:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 5428. [2021-06-05 23:37:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 3.3738713838216325) internal successors, (18310), 5427 states have internal predecessors, (18310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 18310 transitions. [2021-06-05 23:37:36,562 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 18310 transitions. Word has length 30 [2021-06-05 23:37:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:36,562 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 18310 transitions. [2021-06-05 23:37:36,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 18310 transitions. [2021-06-05 23:37:36,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:36,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:36,569 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:36,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 23:37:36,769 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:36,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:36,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1854264556, now seen corresponding path program 16 times [2021-06-05 23:37:36,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:36,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020614393] [2021-06-05 23:37:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:37,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:37,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020614393] [2021-06-05 23:37:37,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020614393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:37,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076698774] [2021-06-05 23:37:37,061 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:37:37,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:37:37,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:37,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:37:37,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:37,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:37,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:37:37,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:37:37,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:37,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:37,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:37,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:37:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:37,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076698774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:37,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:37,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:37:37,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260908384] [2021-06-05 23:37:37,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:37:37,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:37,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:37:37,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:37:37,356 INFO L87 Difference]: Start difference. First operand 5428 states and 18310 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:39,534 INFO L93 Difference]: Finished difference Result 6861 states and 22152 transitions. [2021-06-05 23:37:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:37:39,534 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:39,544 INFO L225 Difference]: With dead ends: 6861 [2021-06-05 23:37:39,544 INFO L226 Difference]: Without dead ends: 6831 [2021-06-05 23:37:39,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 1982.7ms TimeCoverageRelationStatistics Valid=467, Invalid=2839, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:37:39,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6831 states. [2021-06-05 23:37:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6831 to 5431. [2021-06-05 23:37:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 5430 states have (on average 3.3740331491712707) internal successors, (18321), 5430 states have internal predecessors, (18321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 18321 transitions. [2021-06-05 23:37:39,663 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 18321 transitions. Word has length 30 [2021-06-05 23:37:39,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:39,663 INFO L482 AbstractCegarLoop]: Abstraction has 5431 states and 18321 transitions. [2021-06-05 23:37:39,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 18321 transitions. [2021-06-05 23:37:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:39,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:39,669 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:39,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:39,870 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:39,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:39,870 INFO L82 PathProgramCache]: Analyzing trace with hash 822848258, now seen corresponding path program 17 times [2021-06-05 23:37:39,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:39,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548518869] [2021-06-05 23:37:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:40,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:40,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548518869] [2021-06-05 23:37:40,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548518869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:40,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056364510] [2021-06-05 23:37:40,139 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 [2021-06-05 23:37:40,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:37:40,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:40,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:37:40,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:40,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:40,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:37:40,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:37:40,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:40,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:40,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:40,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-05 23:37:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:40,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056364510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:40,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:40,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-05 23:37:40,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210643530] [2021-06-05 23:37:40,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:37:40,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:40,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:37:40,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:37:40,410 INFO L87 Difference]: Start difference. First operand 5431 states and 18321 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:41,603 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 23:37:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:43,034 INFO L93 Difference]: Finished difference Result 6718 states and 21814 transitions. [2021-06-05 23:37:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:37:43,035 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:43,045 INFO L225 Difference]: With dead ends: 6718 [2021-06-05 23:37:43,045 INFO L226 Difference]: Without dead ends: 6688 [2021-06-05 23:37:43,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2112.5ms TimeCoverageRelationStatistics Valid=430, Invalid=2762, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:37:43,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2021-06-05 23:37:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 5426. [2021-06-05 23:37:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5426 states, 5425 states have (on average 3.3741935483870966) internal successors, (18305), 5425 states have internal predecessors, (18305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5426 states to 5426 states and 18305 transitions. [2021-06-05 23:37:43,137 INFO L78 Accepts]: Start accepts. Automaton has 5426 states and 18305 transitions. Word has length 30 [2021-06-05 23:37:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:43,138 INFO L482 AbstractCegarLoop]: Abstraction has 5426 states and 18305 transitions. [2021-06-05 23:37:43,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 5426 states and 18305 transitions. [2021-06-05 23:37:43,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:43,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:43,144 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:43,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:43,344 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:43,345 INFO L82 PathProgramCache]: Analyzing trace with hash -727723502, now seen corresponding path program 18 times [2021-06-05 23:37:43,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:43,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977923084] [2021-06-05 23:37:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:43,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:43,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977923084] [2021-06-05 23:37:43,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977923084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:43,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879663972] [2021-06-05 23:37:43,537 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 [2021-06-05 23:37:43,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:37:43,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:43,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:37:43,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:43,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:43,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:37:43,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:37:43,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:43,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:43,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 23:37:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:43,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879663972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:43,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:43,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:37:43,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992073075] [2021-06-05 23:37:43,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:37:43,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:43,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:37:43,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:37:43,933 INFO L87 Difference]: Start difference. First operand 5426 states and 18305 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:46,007 INFO L93 Difference]: Finished difference Result 9647 states and 31226 transitions. [2021-06-05 23:37:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:37:46,009 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:46,022 INFO L225 Difference]: With dead ends: 9647 [2021-06-05 23:37:46,022 INFO L226 Difference]: Without dead ends: 9632 [2021-06-05 23:37:46,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1468.1ms TimeCoverageRelationStatistics Valid=445, Invalid=3337, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:37:46,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-06-05 23:37:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 5430. [2021-06-05 23:37:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5430 states, 5429 states have (on average 3.375391416467121) internal successors, (18325), 5429 states have internal predecessors, (18325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5430 states to 5430 states and 18325 transitions. [2021-06-05 23:37:46,134 INFO L78 Accepts]: Start accepts. Automaton has 5430 states and 18325 transitions. Word has length 30 [2021-06-05 23:37:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:46,134 INFO L482 AbstractCegarLoop]: Abstraction has 5430 states and 18325 transitions. [2021-06-05 23:37:46,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 5430 states and 18325 transitions. [2021-06-05 23:37:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:46,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:46,141 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:46,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 23:37:46,342 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:46,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1710814064, now seen corresponding path program 19 times [2021-06-05 23:37:46,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:46,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132859221] [2021-06-05 23:37:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:46,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:46,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132859221] [2021-06-05 23:37:46,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132859221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:46,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202415278] [2021-06-05 23:37:46,555 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 [2021-06-05 23:37:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:46,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:37:46,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:46,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:46,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:37:46,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:37:46,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:46,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:46,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:46,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:37:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:46,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202415278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:46,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:46,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:37:46,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474449893] [2021-06-05 23:37:46,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:37:46,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:46,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:37:46,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:37:46,871 INFO L87 Difference]: Start difference. First operand 5430 states and 18325 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:50,338 INFO L93 Difference]: Finished difference Result 9941 states and 32572 transitions. [2021-06-05 23:37:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:37:50,339 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:50,354 INFO L225 Difference]: With dead ends: 9941 [2021-06-05 23:37:50,354 INFO L226 Difference]: Without dead ends: 9926 [2021-06-05 23:37:50,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 2706.5ms TimeCoverageRelationStatistics Valid=728, Invalid=5124, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:37:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2021-06-05 23:37:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 5432. [2021-06-05 23:37:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 3.3758055606702264) internal successors, (18334), 5431 states have internal predecessors, (18334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 18334 transitions. [2021-06-05 23:37:50,459 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 18334 transitions. Word has length 30 [2021-06-05 23:37:50,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:50,460 INFO L482 AbstractCegarLoop]: Abstraction has 5432 states and 18334 transitions. [2021-06-05 23:37:50,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 18334 transitions. [2021-06-05 23:37:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:50,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:50,466 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:50,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:50,670 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:50,670 INFO L82 PathProgramCache]: Analyzing trace with hash -811045396, now seen corresponding path program 20 times [2021-06-05 23:37:50,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:50,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332138164] [2021-06-05 23:37:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:50,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:50,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332138164] [2021-06-05 23:37:50,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332138164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:50,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738972900] [2021-06-05 23:37:50,890 INFO L93 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 [2021-06-05 23:37:50,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:37:50,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:50,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:50,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:51,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:51,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:51,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:37:51,113 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:37:51,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:51,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:51,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:37:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:51,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738972900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:51,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:51,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:37:51,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17197460] [2021-06-05 23:37:51,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:37:51,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:51,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:37:51,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:37:51,181 INFO L87 Difference]: Start difference. First operand 5432 states and 18334 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:55,038 INFO L93 Difference]: Finished difference Result 11162 states and 36367 transitions. [2021-06-05 23:37:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 23:37:55,039 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:55,054 INFO L225 Difference]: With dead ends: 11162 [2021-06-05 23:37:55,055 INFO L226 Difference]: Without dead ends: 11122 [2021-06-05 23:37:55,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2963.9ms TimeCoverageRelationStatistics Valid=893, Invalid=6247, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 23:37:55,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11122 states. [2021-06-05 23:37:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11122 to 5474. [2021-06-05 23:37:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5473 states have (on average 3.379499360496985) internal successors, (18496), 5473 states have internal predecessors, (18496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 18496 transitions. [2021-06-05 23:37:55,166 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 18496 transitions. Word has length 30 [2021-06-05 23:37:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:55,166 INFO L482 AbstractCegarLoop]: Abstraction has 5474 states and 18496 transitions. [2021-06-05 23:37:55,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 18496 transitions. [2021-06-05 23:37:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:55,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:55,174 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:55,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 23:37:55,376 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash -871815986, now seen corresponding path program 21 times [2021-06-05 23:37:55,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:55,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292555688] [2021-06-05 23:37:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:55,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:55,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292555688] [2021-06-05 23:37:55,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292555688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:55,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572309002] [2021-06-05 23:37:55,712 INFO L93 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 [2021-06-05 23:37:55,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:37:55,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:55,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:37:55,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:55,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:55,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:37:55,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:37:55,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:55,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:55,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 23:37:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:56,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572309002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:56,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:56,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 23:37:56,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683370160] [2021-06-05 23:37:56,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:37:56,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:56,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:37:56,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:37:56,106 INFO L87 Difference]: Start difference. First operand 5474 states and 18496 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:57,510 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 23:37:58,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:58,983 INFO L93 Difference]: Finished difference Result 7786 states and 25626 transitions. [2021-06-05 23:37:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:37:58,984 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:37:58,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:58,997 INFO L225 Difference]: With dead ends: 7786 [2021-06-05 23:37:58,998 INFO L226 Difference]: Without dead ends: 7726 [2021-06-05 23:37:58,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 2502.2ms TimeCoverageRelationStatistics Valid=415, Invalid=2665, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:37:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-06-05 23:37:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 5478. [2021-06-05 23:37:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 3.3795873653459925) internal successors, (18510), 5477 states have internal predecessors, (18510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 18510 transitions. [2021-06-05 23:37:59,089 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 18510 transitions. Word has length 30 [2021-06-05 23:37:59,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:59,089 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 18510 transitions. [2021-06-05 23:37:59,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 18510 transitions. [2021-06-05 23:37:59,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:37:59,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:59,096 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:59,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:59,297 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:59,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:59,297 INFO L82 PathProgramCache]: Analyzing trace with hash -462088070, now seen corresponding path program 22 times [2021-06-05 23:37:59,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:59,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611568685] [2021-06-05 23:37:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:59,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:59,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611568685] [2021-06-05 23:37:59,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611568685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:59,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117643057] [2021-06-05 23:37:59,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:37:59,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:37:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:59,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:37:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:59,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:37:59,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:37:59,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:37:59,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:59,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:59,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:37:59,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:37:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:59,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117643057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:59,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:59,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:37:59,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881539078] [2021-06-05 23:37:59,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:37:59,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:59,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:37:59,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:37:59,894 INFO L87 Difference]: Start difference. First operand 5478 states and 18510 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:02,367 INFO L93 Difference]: Finished difference Result 7437 states and 24428 transitions. [2021-06-05 23:38:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:38:02,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:02,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:02,378 INFO L225 Difference]: With dead ends: 7437 [2021-06-05 23:38:02,379 INFO L226 Difference]: Without dead ends: 7422 [2021-06-05 23:38:02,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 2143.3ms TimeCoverageRelationStatistics Valid=550, Invalid=3110, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:38:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7422 states. [2021-06-05 23:38:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7422 to 5480. [2021-06-05 23:38:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5480 states, 5479 states have (on average 3.37999634969885) internal successors, (18519), 5479 states have internal predecessors, (18519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 18519 transitions. [2021-06-05 23:38:02,456 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 18519 transitions. Word has length 30 [2021-06-05 23:38:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:02,456 INFO L482 AbstractCegarLoop]: Abstraction has 5480 states and 18519 transitions. [2021-06-05 23:38:02,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:02,456 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 18519 transitions. [2021-06-05 23:38:02,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:02,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:02,461 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:02,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 23:38:02,662 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1933873822, now seen corresponding path program 23 times [2021-06-05 23:38:02,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:02,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051494460] [2021-06-05 23:38:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:03,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:03,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051494460] [2021-06-05 23:38:03,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051494460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:03,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578942277] [2021-06-05 23:38:03,030 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 [2021-06-05 23:38:03,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:38:03,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:03,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:38:03,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:03,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:03,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:03,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:38:03,212 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:38:03,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:03,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:03,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:38:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:03,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578942277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:03,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:03,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 23:38:03,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16987179] [2021-06-05 23:38:03,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:38:03,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:03,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:38:03,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:38:03,290 INFO L87 Difference]: Start difference. First operand 5480 states and 18519 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:07,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:07,507 INFO L93 Difference]: Finished difference Result 8651 states and 28099 transitions. [2021-06-05 23:38:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:38:07,507 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:07,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:07,520 INFO L225 Difference]: With dead ends: 8651 [2021-06-05 23:38:07,520 INFO L226 Difference]: Without dead ends: 8626 [2021-06-05 23:38:07,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 3506.2ms TimeCoverageRelationStatistics Valid=720, Invalid=5442, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:38:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-06-05 23:38:07,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 5486. [2021-06-05 23:38:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5485 states have (on average 3.3808568824065635) internal successors, (18544), 5485 states have internal predecessors, (18544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 18544 transitions. [2021-06-05 23:38:07,621 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 18544 transitions. Word has length 30 [2021-06-05 23:38:07,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:07,621 INFO L482 AbstractCegarLoop]: Abstraction has 5486 states and 18544 transitions. [2021-06-05 23:38:07,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 18544 transitions. [2021-06-05 23:38:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:07,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:07,628 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:07,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 23:38:07,829 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:07,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:07,829 INFO L82 PathProgramCache]: Analyzing trace with hash 372399859, now seen corresponding path program 18 times [2021-06-05 23:38:07,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:07,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873452195] [2021-06-05 23:38:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:08,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:08,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873452195] [2021-06-05 23:38:08,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873452195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:08,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022221742] [2021-06-05 23:38:08,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:38:08,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:38:08,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:38:08,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:08,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:08,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:08,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:08,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 23:38:08,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:38:08,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:08,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:08,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-06-05 23:38:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:08,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022221742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:08,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:08,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:38:08,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179491530] [2021-06-05 23:38:08,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:38:08,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:08,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:38:08,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:38:08,712 INFO L87 Difference]: Start difference. First operand 5486 states and 18544 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:14,199 INFO L93 Difference]: Finished difference Result 8032 states and 26021 transitions. [2021-06-05 23:38:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 23:38:14,199 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:14,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:14,210 INFO L225 Difference]: With dead ends: 8032 [2021-06-05 23:38:14,210 INFO L226 Difference]: Without dead ends: 7995 [2021-06-05 23:38:14,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 4395.6ms TimeCoverageRelationStatistics Valid=950, Invalid=7606, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 23:38:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-06-05 23:38:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 5520. [2021-06-05 23:38:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5520 states, 5519 states have (on average 3.3812284834209096) internal successors, (18661), 5519 states have internal predecessors, (18661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5520 states to 5520 states and 18661 transitions. [2021-06-05 23:38:14,287 INFO L78 Accepts]: Start accepts. Automaton has 5520 states and 18661 transitions. Word has length 30 [2021-06-05 23:38:14,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:14,287 INFO L482 AbstractCegarLoop]: Abstraction has 5520 states and 18661 transitions. [2021-06-05 23:38:14,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 5520 states and 18661 transitions. [2021-06-05 23:38:14,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:14,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:14,293 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:14,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 23:38:14,497 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:14,497 INFO L82 PathProgramCache]: Analyzing trace with hash 577548821, now seen corresponding path program 19 times [2021-06-05 23:38:14,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:14,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116802773] [2021-06-05 23:38:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:14,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:14,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116802773] [2021-06-05 23:38:14,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116802773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:14,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406548350] [2021-06-05 23:38:14,872 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 [2021-06-05 23:38:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:14,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:38:14,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:15,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:15,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:15,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:38:15,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:38:15,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:38:15,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:15,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:15,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:15,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:38:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:15,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406548350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:15,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:15,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 23:38:15,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490553054] [2021-06-05 23:38:15,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:38:15,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:15,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:38:15,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:38:15,126 INFO L87 Difference]: Start difference. First operand 5520 states and 18661 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:18,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:18,143 INFO L93 Difference]: Finished difference Result 9535 states and 31254 transitions. [2021-06-05 23:38:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:38:18,143 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:18,157 INFO L225 Difference]: With dead ends: 9535 [2021-06-05 23:38:18,158 INFO L226 Difference]: Without dead ends: 9505 [2021-06-05 23:38:18,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 2684.5ms TimeCoverageRelationStatistics Valid=693, Invalid=3863, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:38:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9505 states. [2021-06-05 23:38:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9505 to 5583. [2021-06-05 23:38:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 3.3885704048728056) internal successors, (18915), 5582 states have internal predecessors, (18915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 18915 transitions. [2021-06-05 23:38:18,254 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 18915 transitions. Word has length 30 [2021-06-05 23:38:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:18,254 INFO L482 AbstractCegarLoop]: Abstraction has 5583 states and 18915 transitions. [2021-06-05 23:38:18,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 18915 transitions. [2021-06-05 23:38:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:18,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:18,260 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:18,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:18,461 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:18,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1944310639, now seen corresponding path program 20 times [2021-06-05 23:38:18,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:18,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332926920] [2021-06-05 23:38:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:18,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:18,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332926920] [2021-06-05 23:38:18,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332926920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:18,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252034615] [2021-06-05 23:38:18,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:38:18,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:38:18,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:18,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:38:18,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:19,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:19,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:19,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:19,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:19,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 23:38:19,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:38:19,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:19,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:19,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 23:38:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:19,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252034615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:19,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:19,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-05 23:38:19,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773685444] [2021-06-05 23:38:19,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:38:19,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:38:19,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:38:19,076 INFO L87 Difference]: Start difference. First operand 5583 states and 18915 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:21,240 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-05 23:38:25,853 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-05 23:38:26,890 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 23:38:27,276 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 23:38:27,671 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 23:38:28,308 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 23:38:29,736 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-05 23:38:29,874 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-05 23:38:30,224 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 23:38:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:30,587 INFO L93 Difference]: Finished difference Result 11977 states and 38541 transitions. [2021-06-05 23:38:30,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-05 23:38:30,587 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:30,605 INFO L225 Difference]: With dead ends: 11977 [2021-06-05 23:38:30,605 INFO L226 Difference]: Without dead ends: 11930 [2021-06-05 23:38:30,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11084 ImplicationChecksByTransitivity, 10060.8ms TimeCoverageRelationStatistics Valid=3976, Invalid=22756, Unknown=0, NotChecked=0, Total=26732 [2021-06-05 23:38:30,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11930 states. [2021-06-05 23:38:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11930 to 5693. [2021-06-05 23:38:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5693 states, 5692 states have (on average 3.3979269149683766) internal successors, (19341), 5692 states have internal predecessors, (19341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5693 states to 5693 states and 19341 transitions. [2021-06-05 23:38:30,737 INFO L78 Accepts]: Start accepts. Automaton has 5693 states and 19341 transitions. Word has length 30 [2021-06-05 23:38:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:30,737 INFO L482 AbstractCegarLoop]: Abstraction has 5693 states and 19341 transitions. [2021-06-05 23:38:30,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 5693 states and 19341 transitions. [2021-06-05 23:38:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:30,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:30,744 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:30,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 23:38:30,945 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:30,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:30,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1119676269, now seen corresponding path program 21 times [2021-06-05 23:38:30,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:30,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518212875] [2021-06-05 23:38:30,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:31,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:31,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518212875] [2021-06-05 23:38:31,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518212875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:31,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337103072] [2021-06-05 23:38:31,487 INFO L93 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 [2021-06-05 23:38:31,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:38:31,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:31,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:38:31,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:31,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:38:31,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:38:31,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:38:31,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:31,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:31,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:31,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:38:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:31,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337103072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:31,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:31,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 23:38:31,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033640496] [2021-06-05 23:38:31,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:38:31,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:31,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:38:31,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:38:31,771 INFO L87 Difference]: Start difference. First operand 5693 states and 19341 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:35,955 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2021-06-05 23:38:36,764 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-06-05 23:38:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:37,337 INFO L93 Difference]: Finished difference Result 7655 states and 25147 transitions. [2021-06-05 23:38:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:38:37,337 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:37,349 INFO L225 Difference]: With dead ends: 7655 [2021-06-05 23:38:37,349 INFO L226 Difference]: Without dead ends: 7629 [2021-06-05 23:38:37,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 4465.3ms TimeCoverageRelationStatistics Valid=738, Invalid=6234, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:38:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2021-06-05 23:38:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 5684. [2021-06-05 23:38:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5684 states, 5683 states have (on average 3.39767728312511) internal successors, (19309), 5683 states have internal predecessors, (19309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5684 states to 5684 states and 19309 transitions. [2021-06-05 23:38:37,439 INFO L78 Accepts]: Start accepts. Automaton has 5684 states and 19309 transitions. Word has length 30 [2021-06-05 23:38:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:37,439 INFO L482 AbstractCegarLoop]: Abstraction has 5684 states and 19309 transitions. [2021-06-05 23:38:37,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 5684 states and 19309 transitions. [2021-06-05 23:38:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:37,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:37,447 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:37,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 23:38:37,647 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:37,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1069732346, now seen corresponding path program 24 times [2021-06-05 23:38:37,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:37,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602203061] [2021-06-05 23:38:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:37,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:37,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602203061] [2021-06-05 23:38:37,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602203061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:37,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650948898] [2021-06-05 23:38:37,979 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 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 [2021-06-05 23:38:38,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:38:38,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:38,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:38:38,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:38,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:38,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:38:38,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:38:38,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:38,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:38,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:38,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:38:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:38,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650948898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:38,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:38,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:38:38,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102239877] [2021-06-05 23:38:38,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:38:38,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:38,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:38:38,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:38:38,291 INFO L87 Difference]: Start difference. First operand 5684 states and 19309 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:40,080 INFO L93 Difference]: Finished difference Result 6886 states and 22588 transitions. [2021-06-05 23:38:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:38:40,081 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:40,092 INFO L225 Difference]: With dead ends: 6886 [2021-06-05 23:38:40,092 INFO L226 Difference]: Without dead ends: 6871 [2021-06-05 23:38:40,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1551.0ms TimeCoverageRelationStatistics Valid=318, Invalid=2132, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:38:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-06-05 23:38:40,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 5694. [2021-06-05 23:38:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5694 states, 5693 states have (on average 3.3975057087651503) internal successors, (19342), 5693 states have internal predecessors, (19342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 19342 transitions. [2021-06-05 23:38:40,180 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 19342 transitions. Word has length 30 [2021-06-05 23:38:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:40,180 INFO L482 AbstractCegarLoop]: Abstraction has 5694 states and 19342 transitions. [2021-06-05 23:38:40,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 19342 transitions. [2021-06-05 23:38:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:40,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:40,187 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:40,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:40,388 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:40,388 INFO L82 PathProgramCache]: Analyzing trace with hash 804664962, now seen corresponding path program 25 times [2021-06-05 23:38:40,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:40,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974368054] [2021-06-05 23:38:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:40,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:40,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974368054] [2021-06-05 23:38:40,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974368054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:40,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326836678] [2021-06-05 23:38:40,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:38:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:40,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:38:40,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:40,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:40,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:38:40,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:38:40,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:40,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:40,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:40,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:38:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:40,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326836678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:40,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:40,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:38:40,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756409463] [2021-06-05 23:38:40,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:38:40,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:40,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:38:40,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:38:40,895 INFO L87 Difference]: Start difference. First operand 5694 states and 19342 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:42,411 INFO L93 Difference]: Finished difference Result 6877 states and 22547 transitions. [2021-06-05 23:38:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:38:42,411 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:42,421 INFO L225 Difference]: With dead ends: 6877 [2021-06-05 23:38:42,421 INFO L226 Difference]: Without dead ends: 6847 [2021-06-05 23:38:42,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1355.0ms TimeCoverageRelationStatistics Valid=332, Invalid=2020, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:38:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2021-06-05 23:38:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 5686. [2021-06-05 23:38:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5686 states, 5685 states have (on average 3.39806508355321) internal successors, (19318), 5685 states have internal predecessors, (19318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5686 states to 5686 states and 19318 transitions. [2021-06-05 23:38:42,502 INFO L78 Accepts]: Start accepts. Automaton has 5686 states and 19318 transitions. Word has length 30 [2021-06-05 23:38:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:42,502 INFO L482 AbstractCegarLoop]: Abstraction has 5686 states and 19318 transitions. [2021-06-05 23:38:42,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5686 states and 19318 transitions. [2021-06-05 23:38:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:42,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:42,509 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:42,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:42,710 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:42,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:42,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2028611540, now seen corresponding path program 26 times [2021-06-05 23:38:42,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:42,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93548037] [2021-06-05 23:38:42,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:43,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:43,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93548037] [2021-06-05 23:38:43,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93548037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:43,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634347451] [2021-06-05 23:38:43,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:38:43,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:38:43,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:38:43,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:43,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:43,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:43,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:38:43,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:43,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-05 23:38:43,273 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:38:43,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:43,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:43,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 23:38:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:43,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634347451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:43,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:43,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 23:38:43,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504562711] [2021-06-05 23:38:43,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:38:43,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:43,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:38:43,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:38:43,344 INFO L87 Difference]: Start difference. First operand 5686 states and 19318 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:46,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:46,080 INFO L93 Difference]: Finished difference Result 10041 states and 32850 transitions. [2021-06-05 23:38:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:38:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:46,095 INFO L225 Difference]: With dead ends: 10041 [2021-06-05 23:38:46,095 INFO L226 Difference]: Without dead ends: 9990 [2021-06-05 23:38:46,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 2067.6ms TimeCoverageRelationStatistics Valid=588, Invalid=3444, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:38:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2021-06-05 23:38:46,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 5722. [2021-06-05 23:38:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5722 states, 5721 states have (on average 3.3997552875371437) internal successors, (19450), 5721 states have internal predecessors, (19450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5722 states to 5722 states and 19450 transitions. [2021-06-05 23:38:46,205 INFO L78 Accepts]: Start accepts. Automaton has 5722 states and 19450 transitions. Word has length 30 [2021-06-05 23:38:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:46,206 INFO L482 AbstractCegarLoop]: Abstraction has 5722 states and 19450 transitions. [2021-06-05 23:38:46,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 5722 states and 19450 transitions. [2021-06-05 23:38:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:46,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:46,212 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:46,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:46,413 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:46,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash 904208534, now seen corresponding path program 27 times [2021-06-05 23:38:46,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:46,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712665997] [2021-06-05 23:38:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:46,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:46,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712665997] [2021-06-05 23:38:46,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712665997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:46,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321436775] [2021-06-05 23:38:46,643 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 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 [2021-06-05 23:38:46,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:38:46,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:46,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:38:46,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:46,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:46,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:38:46,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:38:46,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:46,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:46,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 23:38:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:47,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321436775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:47,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:47,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 23:38:47,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503702750] [2021-06-05 23:38:47,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:38:47,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:47,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:38:47,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:38:47,063 INFO L87 Difference]: Start difference. First operand 5722 states and 19450 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:48,279 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 23:38:50,195 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 23:38:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:52,832 INFO L93 Difference]: Finished difference Result 9402 states and 30638 transitions. [2021-06-05 23:38:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 23:38:52,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:52,846 INFO L225 Difference]: With dead ends: 9402 [2021-06-05 23:38:52,846 INFO L226 Difference]: Without dead ends: 9361 [2021-06-05 23:38:52,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4732.0ms TimeCoverageRelationStatistics Valid=1092, Invalid=9008, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 23:38:52,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9361 states. [2021-06-05 23:38:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9361 to 5721. [2021-06-05 23:38:52,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5721 states, 5720 states have (on average 3.3998251748251747) internal successors, (19447), 5720 states have internal predecessors, (19447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5721 states to 5721 states and 19447 transitions. [2021-06-05 23:38:52,953 INFO L78 Accepts]: Start accepts. Automaton has 5721 states and 19447 transitions. Word has length 30 [2021-06-05 23:38:52,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:52,953 INFO L482 AbstractCegarLoop]: Abstraction has 5721 states and 19447 transitions. [2021-06-05 23:38:52,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:52,953 INFO L276 IsEmpty]: Start isEmpty. Operand 5721 states and 19447 transitions. [2021-06-05 23:38:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:52,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:52,961 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:53,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 23:38:53,161 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:53,162 INFO L82 PathProgramCache]: Analyzing trace with hash 981599646, now seen corresponding path program 28 times [2021-06-05 23:38:53,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:53,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120336595] [2021-06-05 23:38:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:53,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:53,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120336595] [2021-06-05 23:38:53,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120336595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:53,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960137399] [2021-06-05 23:38:53,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:38:53,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:38:53,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:53,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:38:53,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:53,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:53,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:38:53,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:38:53,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:53,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:53,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:53,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:38:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:53,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960137399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:53,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:53,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:38:53,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852230265] [2021-06-05 23:38:53,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:38:53,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:53,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:38:53,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:38:53,634 INFO L87 Difference]: Start difference. First operand 5721 states and 19447 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:55,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:55,294 INFO L93 Difference]: Finished difference Result 7360 states and 24539 transitions. [2021-06-05 23:38:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:38:55,294 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:55,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:55,304 INFO L225 Difference]: With dead ends: 7360 [2021-06-05 23:38:55,304 INFO L226 Difference]: Without dead ends: 7345 [2021-06-05 23:38:55,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1258.8ms TimeCoverageRelationStatistics Valid=306, Invalid=1856, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:38:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7345 states. [2021-06-05 23:38:55,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7345 to 5726. [2021-06-05 23:38:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5726 states, 5725 states have (on average 3.399475982532751) internal successors, (19462), 5725 states have internal predecessors, (19462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5726 states to 5726 states and 19462 transitions. [2021-06-05 23:38:55,384 INFO L78 Accepts]: Start accepts. Automaton has 5726 states and 19462 transitions. Word has length 30 [2021-06-05 23:38:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:55,384 INFO L482 AbstractCegarLoop]: Abstraction has 5726 states and 19462 transitions. [2021-06-05 23:38:55,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 5726 states and 19462 transitions. [2021-06-05 23:38:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:55,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:55,390 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:55,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:55,590 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:55,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:55,591 INFO L82 PathProgramCache]: Analyzing trace with hash -932624076, now seen corresponding path program 29 times [2021-06-05 23:38:55,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:55,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340429580] [2021-06-05 23:38:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:55,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:55,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340429580] [2021-06-05 23:38:55,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340429580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:55,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239476348] [2021-06-05 23:38:55,818 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 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 [2021-06-05 23:38:55,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:38:55,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:55,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:38:55,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:56,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:38:56,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:38:56,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:56,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:56,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:56,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-05 23:38:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:56,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239476348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:56,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:56,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 23:38:56,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834292499] [2021-06-05 23:38:56,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:38:56,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:56,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:38:56,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:38:56,075 INFO L87 Difference]: Start difference. First operand 5726 states and 19462 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:57,653 INFO L93 Difference]: Finished difference Result 7333 states and 24469 transitions. [2021-06-05 23:38:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:38:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:57,665 INFO L225 Difference]: With dead ends: 7333 [2021-06-05 23:38:57,665 INFO L226 Difference]: Without dead ends: 7318 [2021-06-05 23:38:57,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1252.8ms TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:38:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2021-06-05 23:38:57,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 5723. [2021-06-05 23:38:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5722 states have (on average 3.399860188745194) internal successors, (19454), 5722 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 19454 transitions. [2021-06-05 23:38:57,759 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 19454 transitions. Word has length 30 [2021-06-05 23:38:57,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:57,759 INFO L482 AbstractCegarLoop]: Abstraction has 5723 states and 19454 transitions. [2021-06-05 23:38:57,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:57,759 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 19454 transitions. [2021-06-05 23:38:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:57,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:57,767 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:57,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:57,968 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:57,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:57,968 INFO L82 PathProgramCache]: Analyzing trace with hash 946570758, now seen corresponding path program 30 times [2021-06-05 23:38:57,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:57,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509727070] [2021-06-05 23:38:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:58,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:58,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509727070] [2021-06-05 23:38:58,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509727070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:58,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029622959] [2021-06-05 23:38:58,235 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 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 [2021-06-05 23:38:58,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:38:58,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:58,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:38:58,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:58,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:38:58,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:58,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:38:58,397 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:38:58,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:58,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:38:58,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:38:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:58,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029622959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:58,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:58,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 23:38:58,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695252886] [2021-06-05 23:38:58,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:38:58,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:58,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:38:58,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:38:58,479 INFO L87 Difference]: Start difference. First operand 5723 states and 19454 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:01,611 INFO L93 Difference]: Finished difference Result 7729 states and 25674 transitions. [2021-06-05 23:39:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:39:01,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:01,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:01,623 INFO L225 Difference]: With dead ends: 7729 [2021-06-05 23:39:01,623 INFO L226 Difference]: Without dead ends: 7704 [2021-06-05 23:39:01,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2658.5ms TimeCoverageRelationStatistics Valid=615, Invalid=4077, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:39:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7704 states. [2021-06-05 23:39:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7704 to 5705. [2021-06-05 23:39:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5704 states have (on average 3.399193548387097) internal successors, (19389), 5704 states have internal predecessors, (19389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:01,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 19389 transitions. [2021-06-05 23:39:01,715 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 19389 transitions. Word has length 30 [2021-06-05 23:39:01,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:01,716 INFO L482 AbstractCegarLoop]: Abstraction has 5705 states and 19389 transitions. [2021-06-05 23:39:01,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:01,716 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 19389 transitions. [2021-06-05 23:39:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:01,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:01,722 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:01,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-05 23:39:01,923 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:01,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:01,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2078010192, now seen corresponding path program 31 times [2021-06-05 23:39:01,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:01,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962173609] [2021-06-05 23:39:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:02,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:02,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962173609] [2021-06-05 23:39:02,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962173609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:02,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400624416] [2021-06-05 23:39:02,149 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 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 [2021-06-05 23:39:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:02,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:39:02,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:02,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:39:02,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:39:02,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:02,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:02,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:02,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:39:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:02,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400624416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:02,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:02,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:39:02,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352585295] [2021-06-05 23:39:02,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:39:02,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:02,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:39:02,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:39:02,398 INFO L87 Difference]: Start difference. First operand 5705 states and 19389 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:04,478 INFO L93 Difference]: Finished difference Result 7595 states and 25322 transitions. [2021-06-05 23:39:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:39:04,479 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:04,489 INFO L225 Difference]: With dead ends: 7595 [2021-06-05 23:39:04,489 INFO L226 Difference]: Without dead ends: 7580 [2021-06-05 23:39:04,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1669.5ms TimeCoverageRelationStatistics Valid=427, Invalid=2543, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:39:04,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7580 states. [2021-06-05 23:39:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7580 to 5709. [2021-06-05 23:39:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 3.399614576033637) internal successors, (19405), 5708 states have internal predecessors, (19405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 19405 transitions. [2021-06-05 23:39:04,574 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 19405 transitions. Word has length 30 [2021-06-05 23:39:04,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:04,574 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 19405 transitions. [2021-06-05 23:39:04,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 19405 transitions. [2021-06-05 23:39:04,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:04,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:04,581 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:04,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 23:39:04,781 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:04,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:04,782 INFO L82 PathProgramCache]: Analyzing trace with hash -272462056, now seen corresponding path program 32 times [2021-06-05 23:39:04,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:04,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302983000] [2021-06-05 23:39:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:05,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:05,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302983000] [2021-06-05 23:39:05,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302983000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:05,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594671052] [2021-06-05 23:39:05,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:39:05,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:39:05,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:39:05,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:05,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:05,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:05,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:39:05,185 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:39:05,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:05,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:05,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:39:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:05,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594671052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:05,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:05,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:39:05,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298306314] [2021-06-05 23:39:05,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:39:05,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:05,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:39:05,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:39:05,253 INFO L87 Difference]: Start difference. First operand 5709 states and 19405 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:08,835 INFO L93 Difference]: Finished difference Result 8496 states and 28174 transitions. [2021-06-05 23:39:08,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 23:39:08,835 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:08,849 INFO L225 Difference]: With dead ends: 8496 [2021-06-05 23:39:08,849 INFO L226 Difference]: Without dead ends: 8471 [2021-06-05 23:39:08,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 3061.0ms TimeCoverageRelationStatistics Valid=835, Invalid=5171, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 23:39:08,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8471 states. [2021-06-05 23:39:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8471 to 5694. [2021-06-05 23:39:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5694 states, 5693 states have (on average 3.3990865975759705) internal successors, (19351), 5693 states have internal predecessors, (19351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 19351 transitions. [2021-06-05 23:39:08,957 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 19351 transitions. Word has length 30 [2021-06-05 23:39:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:08,957 INFO L482 AbstractCegarLoop]: Abstraction has 5694 states and 19351 transitions. [2021-06-05 23:39:08,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 19351 transitions. [2021-06-05 23:39:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:08,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:08,964 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:09,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 23:39:09,165 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:09,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1633979309, now seen corresponding path program 30 times [2021-06-05 23:39:09,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:09,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939163046] [2021-06-05 23:39:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:09,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939163046] [2021-06-05 23:39:09,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939163046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083574382] [2021-06-05 23:39:09,291 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 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 [2021-06-05 23:39:09,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:39:09,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:09,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:39:09,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:09,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:09,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:39:09,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:39:09,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:09,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:09,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:38 [2021-06-05 23:39:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:09,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083574382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:09,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:09,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-06-05 23:39:09,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23987462] [2021-06-05 23:39:09,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:39:09,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:09,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:39:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:39:09,620 INFO L87 Difference]: Start difference. First operand 5694 states and 19351 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:10,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:10,426 INFO L93 Difference]: Finished difference Result 7140 states and 23704 transitions. [2021-06-05 23:39:10,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:39:10,426 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:10,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:10,437 INFO L225 Difference]: With dead ends: 7140 [2021-06-05 23:39:10,437 INFO L226 Difference]: Without dead ends: 7002 [2021-06-05 23:39:10,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 571.4ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:39:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7002 states. [2021-06-05 23:39:10,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7002 to 5718. [2021-06-05 23:39:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 3.3998600664684275) internal successors, (19437), 5717 states have internal predecessors, (19437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 19437 transitions. [2021-06-05 23:39:10,525 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 19437 transitions. Word has length 30 [2021-06-05 23:39:10,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:10,525 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 19437 transitions. [2021-06-05 23:39:10,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:10,525 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 19437 transitions. [2021-06-05 23:39:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:10,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:10,532 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:10,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 23:39:10,733 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:10,733 INFO L82 PathProgramCache]: Analyzing trace with hash -679268830, now seen corresponding path program 33 times [2021-06-05 23:39:10,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:10,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347978406] [2021-06-05 23:39:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:11,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:11,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347978406] [2021-06-05 23:39:11,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347978406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:11,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624782969] [2021-06-05 23:39:11,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:39:11,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:39:11,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:11,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:39:11,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:11,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:11,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:11,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 23:39:11,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:11,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:11,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:11,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:41 [2021-06-05 23:39:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:11,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624782969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:11,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:11,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 23:39:11,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516951068] [2021-06-05 23:39:11,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:39:11,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:11,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:39:11,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:39:11,513 INFO L87 Difference]: Start difference. First operand 5718 states and 19437 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:12,448 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 23:39:12,941 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-05 23:39:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:13,871 INFO L93 Difference]: Finished difference Result 8751 states and 28822 transitions. [2021-06-05 23:39:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:39:13,871 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:13,884 INFO L225 Difference]: With dead ends: 8751 [2021-06-05 23:39:13,884 INFO L226 Difference]: Without dead ends: 8725 [2021-06-05 23:39:13,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1953.0ms TimeCoverageRelationStatistics Valid=379, Invalid=2483, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:39:13,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8725 states. [2021-06-05 23:39:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8725 to 5809. [2021-06-05 23:39:13,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 5808 states have (on average 3.4013429752066116) internal successors, (19755), 5808 states have internal predecessors, (19755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 19755 transitions. [2021-06-05 23:39:13,974 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 19755 transitions. Word has length 30 [2021-06-05 23:39:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:13,975 INFO L482 AbstractCegarLoop]: Abstraction has 5809 states and 19755 transitions. [2021-06-05 23:39:13,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 19755 transitions. [2021-06-05 23:39:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:13,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:13,981 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:14,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:14,185 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:14,185 INFO L82 PathProgramCache]: Analyzing trace with hash -190748142, now seen corresponding path program 34 times [2021-06-05 23:39:14,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:14,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264959205] [2021-06-05 23:39:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:14,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:14,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264959205] [2021-06-05 23:39:14,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264959205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:14,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85236607] [2021-06-05 23:39:14,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:39:14,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:39:14,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:14,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:39:14,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:14,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:39:14,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:39:14,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:14,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:14,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:14,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:39:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:14,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85236607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:14,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:14,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:39:14,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993550445] [2021-06-05 23:39:14,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:39:14,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:14,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:39:14,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:39:14,626 INFO L87 Difference]: Start difference. First operand 5809 states and 19755 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:16,830 INFO L93 Difference]: Finished difference Result 10525 states and 34115 transitions. [2021-06-05 23:39:16,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:39:16,830 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:16,847 INFO L225 Difference]: With dead ends: 10525 [2021-06-05 23:39:16,847 INFO L226 Difference]: Without dead ends: 10504 [2021-06-05 23:39:16,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1629.8ms TimeCoverageRelationStatistics Valid=552, Invalid=3870, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:39:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10504 states. [2021-06-05 23:39:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10504 to 5873. [2021-06-05 23:39:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 5872 states have (on average 3.403440054495913) internal successors, (19985), 5872 states have internal predecessors, (19985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 19985 transitions. [2021-06-05 23:39:16,964 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 19985 transitions. Word has length 30 [2021-06-05 23:39:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:16,964 INFO L482 AbstractCegarLoop]: Abstraction has 5873 states and 19985 transitions. [2021-06-05 23:39:16,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:16,964 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 19985 transitions. [2021-06-05 23:39:16,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:16,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:16,971 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:17,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:17,172 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:17,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:17,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2047177872, now seen corresponding path program 35 times [2021-06-05 23:39:17,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:17,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446080088] [2021-06-05 23:39:17,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:17,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:17,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446080088] [2021-06-05 23:39:17,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446080088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:17,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027393708] [2021-06-05 23:39:17,373 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 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 [2021-06-05 23:39:17,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:39:17,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:17,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:39:17,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:17,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:17,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:39:17,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:39:17,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:17,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:17,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:17,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:39:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:17,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027393708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:17,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:17,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:39:17,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175583722] [2021-06-05 23:39:17,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:39:17,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:17,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:39:17,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:39:17,712 INFO L87 Difference]: Start difference. First operand 5873 states and 19985 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:19,228 INFO L93 Difference]: Finished difference Result 9687 states and 31917 transitions. [2021-06-05 23:39:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:39:19,228 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:19,244 INFO L225 Difference]: With dead ends: 9687 [2021-06-05 23:39:19,244 INFO L226 Difference]: Without dead ends: 9666 [2021-06-05 23:39:19,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1216.9ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:39:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2021-06-05 23:39:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 5903. [2021-06-05 23:39:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5903 states, 5902 states have (on average 3.4056252117926125) internal successors, (20100), 5902 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5903 states to 5903 states and 20100 transitions. [2021-06-05 23:39:19,349 INFO L78 Accepts]: Start accepts. Automaton has 5903 states and 20100 transitions. Word has length 30 [2021-06-05 23:39:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:19,349 INFO L482 AbstractCegarLoop]: Abstraction has 5903 states and 20100 transitions. [2021-06-05 23:39:19,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:19,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5903 states and 20100 transitions. [2021-06-05 23:39:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:19,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:19,357 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:19,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:19,557 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:19,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:19,557 INFO L82 PathProgramCache]: Analyzing trace with hash -274070036, now seen corresponding path program 36 times [2021-06-05 23:39:19,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:19,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350666896] [2021-06-05 23:39:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:19,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:19,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350666896] [2021-06-05 23:39:19,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350666896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:19,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951487319] [2021-06-05 23:39:19,748 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 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 [2021-06-05 23:39:19,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:39:19,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:19,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:39:19,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:20,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:20,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:20,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:39:20,031 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:39:20,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:20,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:20,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:39:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:20,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951487319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:20,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:20,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:39:20,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023592530] [2021-06-05 23:39:20,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:39:20,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:20,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:39:20,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:39:20,089 INFO L87 Difference]: Start difference. First operand 5903 states and 20100 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:22,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:22,476 INFO L93 Difference]: Finished difference Result 10523 states and 34450 transitions. [2021-06-05 23:39:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:39:22,476 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:22,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:22,493 INFO L225 Difference]: With dead ends: 10523 [2021-06-05 23:39:22,493 INFO L226 Difference]: Without dead ends: 10456 [2021-06-05 23:39:22,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1798.9ms TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:39:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10456 states. [2021-06-05 23:39:22,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10456 to 5965. [2021-06-05 23:39:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5965 states, 5964 states have (on average 3.416834339369551) internal successors, (20378), 5964 states have internal predecessors, (20378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5965 states to 5965 states and 20378 transitions. [2021-06-05 23:39:22,613 INFO L78 Accepts]: Start accepts. Automaton has 5965 states and 20378 transitions. Word has length 30 [2021-06-05 23:39:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:22,614 INFO L482 AbstractCegarLoop]: Abstraction has 5965 states and 20378 transitions. [2021-06-05 23:39:22,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 5965 states and 20378 transitions. [2021-06-05 23:39:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:22,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:22,621 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:22,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-06-05 23:39:22,822 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:22,822 INFO L82 PathProgramCache]: Analyzing trace with hash 87027730, now seen corresponding path program 37 times [2021-06-05 23:39:22,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:22,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732526860] [2021-06-05 23:39:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:23,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:23,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732526860] [2021-06-05 23:39:23,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732526860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:23,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747090972] [2021-06-05 23:39:23,020 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 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 [2021-06-05 23:39:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:23,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:39:23,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:23,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:23,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:23,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:23,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 23:39:23,209 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:39:23,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:23,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:23,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 23:39:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:23,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747090972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:23,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:23,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:39:23,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76469836] [2021-06-05 23:39:23,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:39:23,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:23,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:39:23,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:39:23,282 INFO L87 Difference]: Start difference. First operand 5965 states and 20378 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:24,522 INFO L93 Difference]: Finished difference Result 9182 states and 30455 transitions. [2021-06-05 23:39:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:39:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:24,538 INFO L225 Difference]: With dead ends: 9182 [2021-06-05 23:39:24,538 INFO L226 Difference]: Without dead ends: 9105 [2021-06-05 23:39:24,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 977.5ms TimeCoverageRelationStatistics Valid=307, Invalid=1673, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:39:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-06-05 23:39:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 5990. [2021-06-05 23:39:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 3.418600768074804) internal successors, (20474), 5989 states have internal predecessors, (20474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:24,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 20474 transitions. [2021-06-05 23:39:24,692 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 20474 transitions. Word has length 30 [2021-06-05 23:39:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:24,693 INFO L482 AbstractCegarLoop]: Abstraction has 5990 states and 20474 transitions. [2021-06-05 23:39:24,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 20474 transitions. [2021-06-05 23:39:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:24,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:24,701 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:24,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 23:39:24,901 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:24,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:24,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2029342979, now seen corresponding path program 31 times [2021-06-05 23:39:24,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:24,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881369434] [2021-06-05 23:39:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:25,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:25,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881369434] [2021-06-05 23:39:25,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881369434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:25,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586973127] [2021-06-05 23:39:25,032 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 [2021-06-05 23:39:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:39:25,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:25,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:39:25,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:25,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:25,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:25,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 23:39:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:25,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586973127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:25,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:25,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 23:39:25,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329654674] [2021-06-05 23:39:25,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:39:25,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:25,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:39:25,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:39:25,188 INFO L87 Difference]: Start difference. First operand 5990 states and 20474 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:25,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:25,328 INFO L93 Difference]: Finished difference Result 6518 states and 22032 transitions. [2021-06-05 23:39:25,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:39:25,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:25,337 INFO L225 Difference]: With dead ends: 6518 [2021-06-05 23:39:25,338 INFO L226 Difference]: Without dead ends: 6449 [2021-06-05 23:39:25,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:39:25,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2021-06-05 23:39:25,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 6000. [2021-06-05 23:39:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6000 states, 5999 states have (on average 3.4140690115019168) internal successors, (20481), 5999 states have internal predecessors, (20481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6000 states to 6000 states and 20481 transitions. [2021-06-05 23:39:25,419 INFO L78 Accepts]: Start accepts. Automaton has 6000 states and 20481 transitions. Word has length 30 [2021-06-05 23:39:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:25,420 INFO L482 AbstractCegarLoop]: Abstraction has 6000 states and 20481 transitions. [2021-06-05 23:39:25,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 6000 states and 20481 transitions. [2021-06-05 23:39:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:25,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:25,426 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:25,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 23:39:25,627 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:25,627 INFO L82 PathProgramCache]: Analyzing trace with hash -824418271, now seen corresponding path program 32 times [2021-06-05 23:39:25,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:25,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844170546] [2021-06-05 23:39:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:25,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:25,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844170546] [2021-06-05 23:39:25,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844170546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:25,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389342624] [2021-06-05 23:39:25,732 INFO L93 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 [2021-06-05 23:39:25,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:39:25,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:25,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:39:25,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:25,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:25,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 23:39:25,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:39:25,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:25,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:25,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:46 [2021-06-05 23:39:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:26,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389342624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:26,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:26,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 21 [2021-06-05 23:39:26,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603465531] [2021-06-05 23:39:26,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:39:26,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:26,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:39:26,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:39:26,095 INFO L87 Difference]: Start difference. First operand 6000 states and 20481 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:26,984 INFO L93 Difference]: Finished difference Result 6705 states and 22557 transitions. [2021-06-05 23:39:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:39:26,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:26,995 INFO L225 Difference]: With dead ends: 6705 [2021-06-05 23:39:26,995 INFO L226 Difference]: Without dead ends: 6643 [2021-06-05 23:39:26,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 726.3ms TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:39:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2021-06-05 23:39:27,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6010. [2021-06-05 23:39:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6009 states have (on average 3.412880678981528) internal successors, (20508), 6009 states have internal predecessors, (20508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 20508 transitions. [2021-06-05 23:39:27,093 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 20508 transitions. Word has length 30 [2021-06-05 23:39:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:27,093 INFO L482 AbstractCegarLoop]: Abstraction has 6010 states and 20508 transitions. [2021-06-05 23:39:27,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:27,094 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 20508 transitions. [2021-06-05 23:39:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:27,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:27,101 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:27,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:27,305 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:27,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:27,305 INFO L82 PathProgramCache]: Analyzing trace with hash -767713039, now seen corresponding path program 33 times [2021-06-05 23:39:27,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:27,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409296652] [2021-06-05 23:39:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:27,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:27,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409296652] [2021-06-05 23:39:27,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409296652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:27,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535446672] [2021-06-05 23:39:27,415 INFO L93 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 [2021-06-05 23:39:27,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:39:27,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:27,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:39:27,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:27,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:27,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:39:27,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:39:27,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:27,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:27,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:139 [2021-06-05 23:39:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:27,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535446672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:27,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:27,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 24 [2021-06-05 23:39:27,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120133604] [2021-06-05 23:39:27,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:39:27,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:27,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:39:27,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:39:27,991 INFO L87 Difference]: Start difference. First operand 6010 states and 20508 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:29,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:29,444 INFO L93 Difference]: Finished difference Result 6764 states and 22726 transitions. [2021-06-05 23:39:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:39:29,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:29,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:29,455 INFO L225 Difference]: With dead ends: 6764 [2021-06-05 23:39:29,455 INFO L226 Difference]: Without dead ends: 6734 [2021-06-05 23:39:29,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1173.2ms TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:39:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-06-05 23:39:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 6038. [2021-06-05 23:39:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6038 states, 6037 states have (on average 3.4132847440781844) internal successors, (20606), 6037 states have internal predecessors, (20606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6038 states to 6038 states and 20606 transitions. [2021-06-05 23:39:29,545 INFO L78 Accepts]: Start accepts. Automaton has 6038 states and 20606 transitions. Word has length 30 [2021-06-05 23:39:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:29,546 INFO L482 AbstractCegarLoop]: Abstraction has 6038 states and 20606 transitions. [2021-06-05 23:39:29,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6038 states and 20606 transitions. [2021-06-05 23:39:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:29,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:29,552 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:29,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 23:39:29,753 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash 864921772, now seen corresponding path program 38 times [2021-06-05 23:39:29,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:29,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650861122] [2021-06-05 23:39:29,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:30,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:30,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650861122] [2021-06-05 23:39:30,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650861122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:30,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360321927] [2021-06-05 23:39:30,161 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 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 [2021-06-05 23:39:30,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:39:30,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:30,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:39:30,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:30,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:30,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 23:39:30,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:30,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:30,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:30,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:41 [2021-06-05 23:39:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:30,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360321927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:30,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:30,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 23:39:30,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847915173] [2021-06-05 23:39:30,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:39:30,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:30,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:39:30,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:39:30,529 INFO L87 Difference]: Start difference. First operand 6038 states and 20606 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:32,433 INFO L93 Difference]: Finished difference Result 7697 states and 25628 transitions. [2021-06-05 23:39:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:39:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:32,446 INFO L225 Difference]: With dead ends: 7697 [2021-06-05 23:39:32,447 INFO L226 Difference]: Without dead ends: 7671 [2021-06-05 23:39:32,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1574.2ms TimeCoverageRelationStatistics Valid=327, Invalid=2025, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:39:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7671 states. [2021-06-05 23:39:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7671 to 6056. [2021-06-05 23:39:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6056 states, 6055 states have (on average 3.4123864574731626) internal successors, (20662), 6055 states have internal predecessors, (20662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6056 states to 6056 states and 20662 transitions. [2021-06-05 23:39:32,536 INFO L78 Accepts]: Start accepts. Automaton has 6056 states and 20662 transitions. Word has length 30 [2021-06-05 23:39:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:32,536 INFO L482 AbstractCegarLoop]: Abstraction has 6056 states and 20662 transitions. [2021-06-05 23:39:32,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 6056 states and 20662 transitions. [2021-06-05 23:39:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:32,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:32,545 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:32,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-05 23:39:32,745 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:32,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:32,745 INFO L82 PathProgramCache]: Analyzing trace with hash -109421332, now seen corresponding path program 39 times [2021-06-05 23:39:32,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:32,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663652832] [2021-06-05 23:39:32,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:33,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:33,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663652832] [2021-06-05 23:39:33,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663652832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:33,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696477716] [2021-06-05 23:39:33,146 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 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 [2021-06-05 23:39:33,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:39:33,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:33,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:39:33,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:33,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:33,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 23:39:33,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:39:33,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:33,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:33,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:158 [2021-06-05 23:39:33,624 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 23:39:33,901 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 23:39:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:34,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696477716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:34,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:34,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:39:34,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052743649] [2021-06-05 23:39:34,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:39:34,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:34,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:39:34,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:39:34,075 INFO L87 Difference]: Start difference. First operand 6056 states and 20662 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:35,335 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 23:39:35,618 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 23:39:36,798 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2021-06-05 23:39:37,000 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 23:39:37,356 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2021-06-05 23:39:37,995 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-06-05 23:39:38,187 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 23:39:38,438 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 23:39:38,720 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-06-05 23:39:38,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:38,920 INFO L93 Difference]: Finished difference Result 8480 states and 28186 transitions. [2021-06-05 23:39:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 23:39:38,920 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:38,934 INFO L225 Difference]: With dead ends: 8480 [2021-06-05 23:39:38,934 INFO L226 Difference]: Without dead ends: 8427 [2021-06-05 23:39:38,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 4550.1ms TimeCoverageRelationStatistics Valid=629, Invalid=4483, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:39:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8427 states. [2021-06-05 23:39:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8427 to 6099. [2021-06-05 23:39:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6099 states, 6098 states have (on average 3.4137422105608395) internal successors, (20817), 6098 states have internal predecessors, (20817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 20817 transitions. [2021-06-05 23:39:39,047 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 20817 transitions. Word has length 30 [2021-06-05 23:39:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:39,047 INFO L482 AbstractCegarLoop]: Abstraction has 6099 states and 20817 transitions. [2021-06-05 23:39:39,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 20817 transitions. [2021-06-05 23:39:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:39,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:39,055 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:39,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:39,256 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:39,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2040035028, now seen corresponding path program 40 times [2021-06-05 23:39:39,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:39,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855417741] [2021-06-05 23:39:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:39,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:39,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855417741] [2021-06-05 23:39:39,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855417741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:39,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918441682] [2021-06-05 23:39:39,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:39:39,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:39:39,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:39,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:39:39,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:39,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:39,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:39:39,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:39:39,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:39,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:39,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:39,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:39:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:39,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918441682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:39,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:39,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:39:39,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725468404] [2021-06-05 23:39:39,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:39:39,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:39,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:39:39,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:39:39,936 INFO L87 Difference]: Start difference. First operand 6099 states and 20817 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:41,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:41,718 INFO L93 Difference]: Finished difference Result 7457 states and 24976 transitions. [2021-06-05 23:39:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:39:41,718 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:41,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:41,729 INFO L225 Difference]: With dead ends: 7457 [2021-06-05 23:39:41,730 INFO L226 Difference]: Without dead ends: 7438 [2021-06-05 23:39:41,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1603.0ms TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:39:41,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2021-06-05 23:39:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 6101. [2021-06-05 23:39:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6101 states, 6100 states have (on average 3.4137704918032785) internal successors, (20824), 6100 states have internal predecessors, (20824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6101 states to 6101 states and 20824 transitions. [2021-06-05 23:39:41,821 INFO L78 Accepts]: Start accepts. Automaton has 6101 states and 20824 transitions. Word has length 30 [2021-06-05 23:39:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:41,821 INFO L482 AbstractCegarLoop]: Abstraction has 6101 states and 20824 transitions. [2021-06-05 23:39:41,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 6101 states and 20824 transitions. [2021-06-05 23:39:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:41,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:41,828 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:42,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:42,049 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:42,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:42,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1418323052, now seen corresponding path program 41 times [2021-06-05 23:39:42,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:42,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126153228] [2021-06-05 23:39:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:42,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:42,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126153228] [2021-06-05 23:39:42,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126153228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:42,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733966115] [2021-06-05 23:39:42,281 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 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 [2021-06-05 23:39:42,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:39:42,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:42,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:39:42,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:42,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:42,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:39:42,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:39:42,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:42,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:42,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:42,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:39:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:42,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733966115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:42,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:42,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:39:42,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413964809] [2021-06-05 23:39:42,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:39:42,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:42,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:39:42,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:39:42,643 INFO L87 Difference]: Start difference. First operand 6101 states and 20824 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:44,075 INFO L93 Difference]: Finished difference Result 9244 states and 30770 transitions. [2021-06-05 23:39:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:39:44,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:44,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:44,089 INFO L225 Difference]: With dead ends: 9244 [2021-06-05 23:39:44,089 INFO L226 Difference]: Without dead ends: 9223 [2021-06-05 23:39:44,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1210.5ms TimeCoverageRelationStatistics Valid=330, Invalid=1926, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:39:44,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9223 states. [2021-06-05 23:39:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9223 to 6163. [2021-06-05 23:39:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6163 states, 6162 states have (on average 3.4138266796494645) internal successors, (21036), 6162 states have internal predecessors, (21036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6163 states to 6163 states and 21036 transitions. [2021-06-05 23:39:44,198 INFO L78 Accepts]: Start accepts. Automaton has 6163 states and 21036 transitions. Word has length 30 [2021-06-05 23:39:44,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:44,199 INFO L482 AbstractCegarLoop]: Abstraction has 6163 states and 21036 transitions. [2021-06-05 23:39:44,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:44,199 INFO L276 IsEmpty]: Start isEmpty. Operand 6163 states and 21036 transitions. [2021-06-05 23:39:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:44,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:44,206 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:44,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 23:39:44,407 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:44,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:44,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1342440280, now seen corresponding path program 42 times [2021-06-05 23:39:44,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:44,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560090653] [2021-06-05 23:39:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:44,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:44,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560090653] [2021-06-05 23:39:44,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560090653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:44,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935089790] [2021-06-05 23:39:44,763 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 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 [2021-06-05 23:39:44,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:39:44,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:44,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:39:44,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:44,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:44,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:44,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:39:44,980 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:39:44,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:44,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:44,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:39:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:45,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935089790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:45,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:45,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 23:39:45,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983043827] [2021-06-05 23:39:45,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:39:45,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:45,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:39:45,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:39:45,035 INFO L87 Difference]: Start difference. First operand 6163 states and 21036 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:47,291 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 23:39:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:48,725 INFO L93 Difference]: Finished difference Result 9714 states and 31902 transitions. [2021-06-05 23:39:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 23:39:48,726 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:48,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:48,740 INFO L225 Difference]: With dead ends: 9714 [2021-06-05 23:39:48,741 INFO L226 Difference]: Without dead ends: 9659 [2021-06-05 23:39:48,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 3002.5ms TimeCoverageRelationStatistics Valid=815, Invalid=6157, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:39:48,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9659 states. [2021-06-05 23:39:48,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9659 to 6173. [2021-06-05 23:39:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6173 states, 6172 states have (on average 3.4149384316267013) internal successors, (21077), 6172 states have internal predecessors, (21077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6173 states to 6173 states and 21077 transitions. [2021-06-05 23:39:48,857 INFO L78 Accepts]: Start accepts. Automaton has 6173 states and 21077 transitions. Word has length 30 [2021-06-05 23:39:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:48,857 INFO L482 AbstractCegarLoop]: Abstraction has 6173 states and 21077 transitions. [2021-06-05 23:39:48,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6173 states and 21077 transitions. [2021-06-05 23:39:48,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:48,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:48,868 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:49,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:49,081 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:49,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:49,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1284214256, now seen corresponding path program 43 times [2021-06-05 23:39:49,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:49,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230065966] [2021-06-05 23:39:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:49,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:49,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230065966] [2021-06-05 23:39:49,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230065966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:49,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918291716] [2021-06-05 23:39:49,356 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 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 [2021-06-05 23:39:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:49,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:39:49,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:49,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:49,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:49,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:49,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 23:39:49,582 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:39:49,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:49,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:49,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 23:39:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:49,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918291716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:49,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:49,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:39:49,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217148249] [2021-06-05 23:39:49,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:39:49,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:49,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:39:49,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:39:49,689 INFO L87 Difference]: Start difference. First operand 6173 states and 21077 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:50,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:50,993 INFO L93 Difference]: Finished difference Result 9307 states and 30934 transitions. [2021-06-05 23:39:50,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:39:50,993 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:50,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:51,007 INFO L225 Difference]: With dead ends: 9307 [2021-06-05 23:39:51,007 INFO L226 Difference]: Without dead ends: 9230 [2021-06-05 23:39:51,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1031.6ms TimeCoverageRelationStatistics Valid=318, Invalid=1574, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:39:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9230 states. [2021-06-05 23:39:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9230 to 6160. [2021-06-05 23:39:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 3.4159766195811008) internal successors, (21039), 6159 states have internal predecessors, (21039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 21039 transitions. [2021-06-05 23:39:51,119 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 21039 transitions. Word has length 30 [2021-06-05 23:39:51,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:51,119 INFO L482 AbstractCegarLoop]: Abstraction has 6160 states and 21039 transitions. [2021-06-05 23:39:51,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 21039 transitions. [2021-06-05 23:39:51,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:51,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:51,127 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:51,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 23:39:51,328 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:51,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1930370840, now seen corresponding path program 44 times [2021-06-05 23:39:51,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:51,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720185827] [2021-06-05 23:39:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:51,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:51,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720185827] [2021-06-05 23:39:51,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720185827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:51,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805785130] [2021-06-05 23:39:51,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:39:51,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:39:51,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:51,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:39:51,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:51,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:51,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:51,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:51,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:39:51,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:51,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-05 23:39:51,862 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:39:51,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:51,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:51,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-05 23:39:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:51,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805785130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:51,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:51,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:39:51,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616516460] [2021-06-05 23:39:51,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:39:51,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:51,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:39:51,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:39:51,946 INFO L87 Difference]: Start difference. First operand 6160 states and 21039 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:55,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:55,539 INFO L93 Difference]: Finished difference Result 10757 states and 35501 transitions. [2021-06-05 23:39:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:39:55,539 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:55,557 INFO L225 Difference]: With dead ends: 10757 [2021-06-05 23:39:55,557 INFO L226 Difference]: Without dead ends: 10710 [2021-06-05 23:39:55,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2732.7ms TimeCoverageRelationStatistics Valid=765, Invalid=5397, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:39:55,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2021-06-05 23:39:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 6165. [2021-06-05 23:39:55,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6165 states, 6164 states have (on average 3.416288124594419) internal successors, (21058), 6164 states have internal predecessors, (21058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6165 states to 6165 states and 21058 transitions. [2021-06-05 23:39:55,721 INFO L78 Accepts]: Start accepts. Automaton has 6165 states and 21058 transitions. Word has length 30 [2021-06-05 23:39:55,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:55,721 INFO L482 AbstractCegarLoop]: Abstraction has 6165 states and 21058 transitions. [2021-06-05 23:39:55,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 6165 states and 21058 transitions. [2021-06-05 23:39:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:55,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:55,730 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:55,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:55,930 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:55,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:55,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1586753244, now seen corresponding path program 45 times [2021-06-05 23:39:55,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:55,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060322419] [2021-06-05 23:39:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:56,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:56,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060322419] [2021-06-05 23:39:56,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060322419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:56,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134334111] [2021-06-05 23:39:56,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:39:56,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:39:56,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:56,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:39:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:56,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:39:56,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:56,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:39:56,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:39:56,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:56,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:39:56,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-06-05 23:39:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:56,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134334111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:56,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:56,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 23:39:56,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728746497] [2021-06-05 23:39:56,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:39:56,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:56,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:39:56,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:39:56,691 INFO L87 Difference]: Start difference. First operand 6165 states and 21058 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:01,104 INFO L93 Difference]: Finished difference Result 8909 states and 29416 transitions. [2021-06-05 23:40:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:40:01,105 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:01,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:01,120 INFO L225 Difference]: With dead ends: 8909 [2021-06-05 23:40:01,120 INFO L226 Difference]: Without dead ends: 8853 [2021-06-05 23:40:01,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 3468.1ms TimeCoverageRelationStatistics Valid=579, Invalid=5583, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:40:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2021-06-05 23:40:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 6186. [2021-06-05 23:40:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6186 states, 6185 states have (on average 3.4202101859337106) internal successors, (21154), 6185 states have internal predecessors, (21154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6186 states to 6186 states and 21154 transitions. [2021-06-05 23:40:01,250 INFO L78 Accepts]: Start accepts. Automaton has 6186 states and 21154 transitions. Word has length 30 [2021-06-05 23:40:01,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:01,250 INFO L482 AbstractCegarLoop]: Abstraction has 6186 states and 21154 transitions. [2021-06-05 23:40:01,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 6186 states and 21154 transitions. [2021-06-05 23:40:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:01,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:01,258 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:01,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 23:40:01,459 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:01,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:01,459 INFO L82 PathProgramCache]: Analyzing trace with hash -181911884, now seen corresponding path program 46 times [2021-06-05 23:40:01,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:01,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911943189] [2021-06-05 23:40:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:01,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:01,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911943189] [2021-06-05 23:40:01,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911943189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:01,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117742577] [2021-06-05 23:40:01,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:40:01,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:01,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:01,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:40:01,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:02,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:02,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:02,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:40:02,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:02,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:02,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:02,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:40:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:02,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117742577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:02,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:02,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:40:02,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755371619] [2021-06-05 23:40:02,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:40:02,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:02,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:40:02,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:40:02,098 INFO L87 Difference]: Start difference. First operand 6186 states and 21154 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:02,860 INFO L93 Difference]: Finished difference Result 7716 states and 26020 transitions. [2021-06-05 23:40:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:40:02,860 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:02,873 INFO L225 Difference]: With dead ends: 7716 [2021-06-05 23:40:02,873 INFO L226 Difference]: Without dead ends: 7695 [2021-06-05 23:40:02,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 746.1ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:40:02,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2021-06-05 23:40:02,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 6196. [2021-06-05 23:40:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 6195 states have (on average 3.419693301049233) internal successors, (21185), 6195 states have internal predecessors, (21185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 21185 transitions. [2021-06-05 23:40:02,975 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 21185 transitions. Word has length 30 [2021-06-05 23:40:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:02,976 INFO L482 AbstractCegarLoop]: Abstraction has 6196 states and 21185 transitions. [2021-06-05 23:40:02,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 21185 transitions. [2021-06-05 23:40:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:02,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:02,983 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:03,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 23:40:03,185 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:03,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1591195952, now seen corresponding path program 47 times [2021-06-05 23:40:03,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:03,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464586785] [2021-06-05 23:40:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:03,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:03,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464586785] [2021-06-05 23:40:03,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464586785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:03,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709344468] [2021-06-05 23:40:03,465 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 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 [2021-06-05 23:40:03,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:40:03,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:03,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:40:03,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:03,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:03,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:03,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 23:40:03,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:40:03,727 INFO L628 ElimStorePlain]: treesize reduction 24, result has 66.2 percent of original size [2021-06-05 23:40:03,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:40:03,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:66 [2021-06-05 23:40:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:03,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709344468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:03,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:03,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 23:40:03,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453788292] [2021-06-05 23:40:03,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:40:03,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:03,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:40:03,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:40:03,843 INFO L87 Difference]: Start difference. First operand 6196 states and 21185 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:04,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:04,732 INFO L93 Difference]: Finished difference Result 8660 states and 28972 transitions. [2021-06-05 23:40:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:40:04,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:04,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:04,749 INFO L225 Difference]: With dead ends: 8660 [2021-06-05 23:40:04,749 INFO L226 Difference]: Without dead ends: 8610 [2021-06-05 23:40:04,749 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 868.1ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:40:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8610 states. [2021-06-05 23:40:04,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8610 to 6247. [2021-06-05 23:40:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6247 states, 6246 states have (on average 3.420268972142171) internal successors, (21363), 6246 states have internal predecessors, (21363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 21363 transitions. [2021-06-05 23:40:04,876 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 21363 transitions. Word has length 30 [2021-06-05 23:40:04,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:04,876 INFO L482 AbstractCegarLoop]: Abstraction has 6247 states and 21363 transitions. [2021-06-05 23:40:04,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 21363 transitions. [2021-06-05 23:40:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:04,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:04,885 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:05,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 23:40:05,103 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:05,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1439678622, now seen corresponding path program 48 times [2021-06-05 23:40:05,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:05,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746534965] [2021-06-05 23:40:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:05,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:05,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746534965] [2021-06-05 23:40:05,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746534965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:05,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558565410] [2021-06-05 23:40:05,441 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 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 [2021-06-05 23:40:05,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:40:05,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:05,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:40:05,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:05,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:05,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:40:05,616 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:40:05,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:05,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:05,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 23:40:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:05,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558565410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:05,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:05,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:40:05,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282598332] [2021-06-05 23:40:05,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:40:05,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:05,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:40:05,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:40:05,697 INFO L87 Difference]: Start difference. First operand 6247 states and 21363 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:06,272 INFO L93 Difference]: Finished difference Result 7945 states and 26808 transitions. [2021-06-05 23:40:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:40:06,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:06,287 INFO L225 Difference]: With dead ends: 7945 [2021-06-05 23:40:06,287 INFO L226 Difference]: Without dead ends: 7920 [2021-06-05 23:40:06,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:40:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2021-06-05 23:40:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 6228. [2021-06-05 23:40:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 3.421069535892083) internal successors, (21303), 6227 states have internal predecessors, (21303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 21303 transitions. [2021-06-05 23:40:06,395 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 21303 transitions. Word has length 30 [2021-06-05 23:40:06,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:06,395 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 21303 transitions. [2021-06-05 23:40:06,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:06,395 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 21303 transitions. [2021-06-05 23:40:06,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:06,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:06,404 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:06,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:06,604 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:06,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:06,605 INFO L82 PathProgramCache]: Analyzing trace with hash 603346348, now seen corresponding path program 49 times [2021-06-05 23:40:06,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:06,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830709842] [2021-06-05 23:40:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:06,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:06,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830709842] [2021-06-05 23:40:06,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830709842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:06,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875492867] [2021-06-05 23:40:06,898 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 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 [2021-06-05 23:40:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:40:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:07,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:07,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:07,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:40:07,083 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:40:07,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:07,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:07,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 23:40:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:07,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875492867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:07,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:07,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:40:07,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555598941] [2021-06-05 23:40:07,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:40:07,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:07,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:40:07,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:40:07,164 INFO L87 Difference]: Start difference. First operand 6228 states and 21303 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:08,042 INFO L93 Difference]: Finished difference Result 8032 states and 27059 transitions. [2021-06-05 23:40:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:40:08,042 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:08,055 INFO L225 Difference]: With dead ends: 8032 [2021-06-05 23:40:08,055 INFO L226 Difference]: Without dead ends: 8007 [2021-06-05 23:40:08,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:40:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8007 states. [2021-06-05 23:40:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8007 to 6224. [2021-06-05 23:40:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6223 states have (on average 3.421018801221276) internal successors, (21289), 6223 states have internal predecessors, (21289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 21289 transitions. [2021-06-05 23:40:08,178 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 21289 transitions. Word has length 30 [2021-06-05 23:40:08,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:08,178 INFO L482 AbstractCegarLoop]: Abstraction has 6224 states and 21289 transitions. [2021-06-05 23:40:08,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 21289 transitions. [2021-06-05 23:40:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:08,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:08,186 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:08,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 23:40:08,389 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:08,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1594721900, now seen corresponding path program 50 times [2021-06-05 23:40:08,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:08,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717984315] [2021-06-05 23:40:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:08,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:08,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717984315] [2021-06-05 23:40:08,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717984315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:08,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799067915] [2021-06-05 23:40:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:40:08,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:08,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:08,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:40:08,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:08,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:08,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:08,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:40:08,836 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:40:08,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:08,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:08,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:40:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:08,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799067915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:08,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:08,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:40:08,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408934952] [2021-06-05 23:40:08,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:40:08,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:08,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:40:08,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:40:08,901 INFO L87 Difference]: Start difference. First operand 6224 states and 21289 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:10,735 INFO L93 Difference]: Finished difference Result 8292 states and 27808 transitions. [2021-06-05 23:40:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:40:10,736 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:10,751 INFO L225 Difference]: With dead ends: 8292 [2021-06-05 23:40:10,751 INFO L226 Difference]: Without dead ends: 8267 [2021-06-05 23:40:10,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1485.0ms TimeCoverageRelationStatistics Valid=393, Invalid=2687, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:40:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-06-05 23:40:10,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 6232. [2021-06-05 23:40:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 6231 states have (on average 3.4204782538918312) internal successors, (21313), 6231 states have internal predecessors, (21313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 21313 transitions. [2021-06-05 23:40:10,923 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 21313 transitions. Word has length 30 [2021-06-05 23:40:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:10,923 INFO L482 AbstractCegarLoop]: Abstraction has 6232 states and 21313 transitions. [2021-06-05 23:40:10,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:10,923 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 21313 transitions. [2021-06-05 23:40:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:10,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:10,931 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:11,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:11,132 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:11,132 INFO L82 PathProgramCache]: Analyzing trace with hash -55546536, now seen corresponding path program 51 times [2021-06-05 23:40:11,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:11,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036234805] [2021-06-05 23:40:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:11,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:11,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036234805] [2021-06-05 23:40:11,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036234805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:11,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259477453] [2021-06-05 23:40:11,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:40:11,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:40:11,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:11,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:40:11,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:11,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:11,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:11,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:40:11,558 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:40:11,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:11,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:11,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:40:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:11,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259477453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:11,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:11,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:40:11,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56098942] [2021-06-05 23:40:11,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:40:11,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:11,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:40:11,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:40:11,631 INFO L87 Difference]: Start difference. First operand 6232 states and 21313 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:13,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:13,730 INFO L93 Difference]: Finished difference Result 8261 states and 27817 transitions. [2021-06-05 23:40:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 23:40:13,730 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:13,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:13,744 INFO L225 Difference]: With dead ends: 8261 [2021-06-05 23:40:13,744 INFO L226 Difference]: Without dead ends: 8230 [2021-06-05 23:40:13,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1611.2ms TimeCoverageRelationStatistics Valid=463, Invalid=3077, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:40:13,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-06-05 23:40:13,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 6240. [2021-06-05 23:40:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6240 states, 6239 states have (on average 3.4199390928033337) internal successors, (21337), 6239 states have internal predecessors, (21337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6240 states to 6240 states and 21337 transitions. [2021-06-05 23:40:13,899 INFO L78 Accepts]: Start accepts. Automaton has 6240 states and 21337 transitions. Word has length 30 [2021-06-05 23:40:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:13,899 INFO L482 AbstractCegarLoop]: Abstraction has 6240 states and 21337 transitions. [2021-06-05 23:40:13,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 6240 states and 21337 transitions. [2021-06-05 23:40:13,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:13,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:13,906 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:14,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 23:40:14,107 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:14,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:14,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1158696, now seen corresponding path program 52 times [2021-06-05 23:40:14,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:14,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599138765] [2021-06-05 23:40:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:14,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:14,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599138765] [2021-06-05 23:40:14,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599138765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:14,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641734015] [2021-06-05 23:40:14,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:40:14,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:14,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:14,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:40:14,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:14,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:14,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:14,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:40:14,550 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:40:14,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:14,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:14,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 23:40:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:14,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641734015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:14,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:14,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:40:14,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774676957] [2021-06-05 23:40:14,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:40:14,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:14,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:40:14,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:40:14,628 INFO L87 Difference]: Start difference. First operand 6240 states and 21337 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:15,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:15,504 INFO L93 Difference]: Finished difference Result 8082 states and 27204 transitions. [2021-06-05 23:40:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:40:15,504 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:15,518 INFO L225 Difference]: With dead ends: 8082 [2021-06-05 23:40:15,518 INFO L226 Difference]: Without dead ends: 8057 [2021-06-05 23:40:15,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:40:15,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8057 states. [2021-06-05 23:40:15,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8057 to 6248. [2021-06-05 23:40:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 3.4194013126300624) internal successors, (21361), 6247 states have internal predecessors, (21361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 21361 transitions. [2021-06-05 23:40:15,642 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 21361 transitions. Word has length 30 [2021-06-05 23:40:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:15,642 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 21361 transitions. [2021-06-05 23:40:15,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 21361 transitions. [2021-06-05 23:40:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:15,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:15,651 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:15,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:15,852 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:15,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:15,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1228760081, now seen corresponding path program 22 times [2021-06-05 23:40:15,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:15,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276252742] [2021-06-05 23:40:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:16,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:16,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276252742] [2021-06-05 23:40:16,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276252742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:16,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397847262] [2021-06-05 23:40:16,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:40:16,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:16,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:16,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:40:16,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:16,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:16,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:16,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:16,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:16,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:40:16,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:16,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:16,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:16,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:40:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:16,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397847262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:16,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:16,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 23:40:16,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397468075] [2021-06-05 23:40:16,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:40:16,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:16,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:40:16,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:40:16,586 INFO L87 Difference]: Start difference. First operand 6248 states and 21361 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:18,931 INFO L93 Difference]: Finished difference Result 7816 states and 26141 transitions. [2021-06-05 23:40:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:40:18,932 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:18,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:18,945 INFO L225 Difference]: With dead ends: 7816 [2021-06-05 23:40:18,945 INFO L226 Difference]: Without dead ends: 7790 [2021-06-05 23:40:18,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2077.4ms TimeCoverageRelationStatistics Valid=515, Invalid=3145, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:40:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-06-05 23:40:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 6242. [2021-06-05 23:40:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6242 states, 6241 states have (on average 3.4202852107034127) internal successors, (21346), 6241 states have internal predecessors, (21346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6242 states to 6242 states and 21346 transitions. [2021-06-05 23:40:19,048 INFO L78 Accepts]: Start accepts. Automaton has 6242 states and 21346 transitions. Word has length 30 [2021-06-05 23:40:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:19,048 INFO L482 AbstractCegarLoop]: Abstraction has 6242 states and 21346 transitions. [2021-06-05 23:40:19,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 6242 states and 21346 transitions. [2021-06-05 23:40:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:19,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:19,056 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:19,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 23:40:19,257 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:19,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1051720055, now seen corresponding path program 23 times [2021-06-05 23:40:19,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:19,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679714647] [2021-06-05 23:40:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:19,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:19,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679714647] [2021-06-05 23:40:19,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679714647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:19,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163426284] [2021-06-05 23:40:19,627 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 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 [2021-06-05 23:40:19,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:40:19,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:19,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:40:19,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:19,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:19,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:19,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:19,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:19,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:40:19,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:19,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:19,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:19,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:40:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:19,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163426284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:19,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:19,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:40:19,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918855961] [2021-06-05 23:40:19,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:40:19,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:19,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:40:19,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:40:19,865 INFO L87 Difference]: Start difference. First operand 6242 states and 21346 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:21,725 INFO L93 Difference]: Finished difference Result 7732 states and 25924 transitions. [2021-06-05 23:40:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:40:21,726 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:21,737 INFO L225 Difference]: With dead ends: 7732 [2021-06-05 23:40:21,738 INFO L226 Difference]: Without dead ends: 7706 [2021-06-05 23:40:21,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1673.4ms TimeCoverageRelationStatistics Valid=529, Invalid=3253, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:40:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2021-06-05 23:40:21,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 6254. [2021-06-05 23:40:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6254 states, 6253 states have (on average 3.418519110826803) internal successors, (21376), 6253 states have internal predecessors, (21376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6254 states to 6254 states and 21376 transitions. [2021-06-05 23:40:21,834 INFO L78 Accepts]: Start accepts. Automaton has 6254 states and 21376 transitions. Word has length 30 [2021-06-05 23:40:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:21,834 INFO L482 AbstractCegarLoop]: Abstraction has 6254 states and 21376 transitions. [2021-06-05 23:40:21,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 6254 states and 21376 transitions. [2021-06-05 23:40:21,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:21,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:21,842 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:22,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 23:40:22,044 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:22,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1089482637, now seen corresponding path program 24 times [2021-06-05 23:40:22,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:22,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996322446] [2021-06-05 23:40:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:22,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:22,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996322446] [2021-06-05 23:40:22,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996322446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:22,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755456366] [2021-06-05 23:40:22,384 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 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 [2021-06-05 23:40:22,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:40:22,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:40:22,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:22,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:22,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:22,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:22,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:22,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 47 [2021-06-05 23:40:22,616 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:40:22,631 INFO L628 ElimStorePlain]: treesize reduction 28, result has 39.1 percent of original size [2021-06-05 23:40:22,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:22,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:28 [2021-06-05 23:40:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:22,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755456366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:22,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:22,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:40:22,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179506384] [2021-06-05 23:40:22,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:40:22,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:22,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:40:22,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:40:22,710 INFO L87 Difference]: Start difference. First operand 6254 states and 21376 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:25,199 INFO L93 Difference]: Finished difference Result 8414 states and 28160 transitions. [2021-06-05 23:40:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:40:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:25,214 INFO L225 Difference]: With dead ends: 8414 [2021-06-05 23:40:25,215 INFO L226 Difference]: Without dead ends: 8388 [2021-06-05 23:40:25,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2007.8ms TimeCoverageRelationStatistics Valid=588, Invalid=3968, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:40:25,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2021-06-05 23:40:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 6316. [2021-06-05 23:40:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6316 states, 6315 states have (on average 3.4134600158353128) internal successors, (21556), 6315 states have internal predecessors, (21556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 21556 transitions. [2021-06-05 23:40:25,335 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 21556 transitions. Word has length 30 [2021-06-05 23:40:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:25,335 INFO L482 AbstractCegarLoop]: Abstraction has 6316 states and 21556 transitions. [2021-06-05 23:40:25,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 21556 transitions. [2021-06-05 23:40:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:25,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:25,344 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:25,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 23:40:25,545 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:25,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:25,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1630768673, now seen corresponding path program 25 times [2021-06-05 23:40:25,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:25,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741316115] [2021-06-05 23:40:25,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:25,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:25,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741316115] [2021-06-05 23:40:25,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741316115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:25,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397490914] [2021-06-05 23:40:25,893 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 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 [2021-06-05 23:40:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:25,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:40:25,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:26,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:26,164 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 23:40:26,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 58 [2021-06-05 23:40:26,166 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:26,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:26,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:26,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:13 [2021-06-05 23:40:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:26,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397490914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:26,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:26,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 23:40:26,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153632690] [2021-06-05 23:40:26,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:40:26,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:26,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:40:26,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:40:26,263 INFO L87 Difference]: Start difference. First operand 6316 states and 21556 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:28,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:28,491 INFO L93 Difference]: Finished difference Result 7885 states and 26351 transitions. [2021-06-05 23:40:28,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:40:28,492 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:28,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:28,506 INFO L225 Difference]: With dead ends: 7885 [2021-06-05 23:40:28,506 INFO L226 Difference]: Without dead ends: 7859 [2021-06-05 23:40:28,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1846.5ms TimeCoverageRelationStatistics Valid=564, Invalid=3596, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:40:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7859 states. [2021-06-05 23:40:28,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7859 to 6324. [2021-06-05 23:40:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6324 states, 6323 states have (on average 3.4123042859402184) internal successors, (21576), 6323 states have internal predecessors, (21576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6324 states to 6324 states and 21576 transitions. [2021-06-05 23:40:28,621 INFO L78 Accepts]: Start accepts. Automaton has 6324 states and 21576 transitions. Word has length 30 [2021-06-05 23:40:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:28,621 INFO L482 AbstractCegarLoop]: Abstraction has 6324 states and 21576 transitions. [2021-06-05 23:40:28,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:28,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6324 states and 21576 transitions. [2021-06-05 23:40:28,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:28,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:28,631 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:28,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:28,831 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:28,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:28,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2139112310, now seen corresponding path program 53 times [2021-06-05 23:40:28,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:28,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132714614] [2021-06-05 23:40:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:29,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:29,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132714614] [2021-06-05 23:40:29,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132714614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:29,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226230628] [2021-06-05 23:40:29,150 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 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 [2021-06-05 23:40:29,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:40:29,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:29,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:40:29,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:29,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:29,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:29,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:40:29,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:29,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:29,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:29,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-05 23:40:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:29,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226230628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:29,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:29,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-05 23:40:29,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312201806] [2021-06-05 23:40:29,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:40:29,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:29,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:40:29,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:40:29,450 INFO L87 Difference]: Start difference. First operand 6324 states and 21576 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:31,203 INFO L93 Difference]: Finished difference Result 7989 states and 26816 transitions. [2021-06-05 23:40:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:40:31,203 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:31,216 INFO L225 Difference]: With dead ends: 7989 [2021-06-05 23:40:31,217 INFO L226 Difference]: Without dead ends: 7968 [2021-06-05 23:40:31,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1524.3ms TimeCoverageRelationStatistics Valid=297, Invalid=1959, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:40:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7968 states. [2021-06-05 23:40:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7968 to 6356. [2021-06-05 23:40:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6356 states, 6355 states have (on average 3.411644374508261) internal successors, (21681), 6355 states have internal predecessors, (21681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6356 states to 6356 states and 21681 transitions. [2021-06-05 23:40:31,317 INFO L78 Accepts]: Start accepts. Automaton has 6356 states and 21681 transitions. Word has length 30 [2021-06-05 23:40:31,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:31,317 INFO L482 AbstractCegarLoop]: Abstraction has 6356 states and 21681 transitions. [2021-06-05 23:40:31,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 6356 states and 21681 transitions. [2021-06-05 23:40:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:31,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:31,325 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:31,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:31,526 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:31,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:31,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1940768934, now seen corresponding path program 54 times [2021-06-05 23:40:31,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:31,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300153394] [2021-06-05 23:40:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:31,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:31,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300153394] [2021-06-05 23:40:31,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300153394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:31,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14814176] [2021-06-05 23:40:31,827 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 [2021-06-05 23:40:31,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:40:31,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:31,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:40:31,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:32,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:32,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:32,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:40:32,007 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:40:32,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:32,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:32,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:40:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:32,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14814176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:32,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:32,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:40:32,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288705409] [2021-06-05 23:40:32,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:40:32,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:32,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:40:32,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:40:32,064 INFO L87 Difference]: Start difference. First operand 6356 states and 21681 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:34,174 INFO L93 Difference]: Finished difference Result 9388 states and 31190 transitions. [2021-06-05 23:40:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:40:34,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:34,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:34,190 INFO L225 Difference]: With dead ends: 9388 [2021-06-05 23:40:34,191 INFO L226 Difference]: Without dead ends: 9344 [2021-06-05 23:40:34,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1756.3ms TimeCoverageRelationStatistics Valid=481, Invalid=3059, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:40:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2021-06-05 23:40:34,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 6373. [2021-06-05 23:40:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6372 states have (on average 3.4110169491525424) internal successors, (21735), 6372 states have internal predecessors, (21735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 21735 transitions. [2021-06-05 23:40:34,326 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 21735 transitions. Word has length 30 [2021-06-05 23:40:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:34,326 INFO L482 AbstractCegarLoop]: Abstraction has 6373 states and 21735 transitions. [2021-06-05 23:40:34,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 21735 transitions. [2021-06-05 23:40:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:34,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:34,336 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:34,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:34,537 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1538373058, now seen corresponding path program 55 times [2021-06-05 23:40:34,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:34,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623296101] [2021-06-05 23:40:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:34,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:34,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623296101] [2021-06-05 23:40:34,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623296101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:34,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204940595] [2021-06-05 23:40:34,867 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 [2021-06-05 23:40:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:34,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:40:34,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:35,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:35,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:35,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:35,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:35,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:35,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-05 23:40:35,051 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:40:35,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:35,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:35,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-05 23:40:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:35,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204940595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:35,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:35,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:40:35,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523477727] [2021-06-05 23:40:35,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:40:35,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:35,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:40:35,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:40:35,140 INFO L87 Difference]: Start difference. First operand 6373 states and 21735 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:36,805 INFO L93 Difference]: Finished difference Result 8603 states and 28835 transitions. [2021-06-05 23:40:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:40:36,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:36,820 INFO L225 Difference]: With dead ends: 8603 [2021-06-05 23:40:36,820 INFO L226 Difference]: Without dead ends: 8553 [2021-06-05 23:40:36,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1336.5ms TimeCoverageRelationStatistics Valid=363, Invalid=1989, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:40:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8553 states. [2021-06-05 23:40:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8553 to 6375. [2021-06-05 23:40:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6375 states, 6374 states have (on average 3.411201757138375) internal successors, (21743), 6374 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6375 states to 6375 states and 21743 transitions. [2021-06-05 23:40:36,931 INFO L78 Accepts]: Start accepts. Automaton has 6375 states and 21743 transitions. Word has length 30 [2021-06-05 23:40:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:36,931 INFO L482 AbstractCegarLoop]: Abstraction has 6375 states and 21743 transitions. [2021-06-05 23:40:36,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:36,931 INFO L276 IsEmpty]: Start isEmpty. Operand 6375 states and 21743 transitions. [2021-06-05 23:40:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:36,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:36,940 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:37,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 23:40:37,140 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:37,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:37,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1512950702, now seen corresponding path program 56 times [2021-06-05 23:40:37,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:37,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498318461] [2021-06-05 23:40:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:37,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:37,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498318461] [2021-06-05 23:40:37,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498318461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:37,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207911273] [2021-06-05 23:40:37,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:40:37,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:37,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:37,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:40:37,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:37,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:37,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:37,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:40:37,661 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:40:37,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:37,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:37,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:40:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:37,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207911273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:37,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:37,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:40:37,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824369934] [2021-06-05 23:40:37,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:40:37,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:37,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:40:37,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:40:37,715 INFO L87 Difference]: Start difference. First operand 6375 states and 21743 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:38,761 INFO L93 Difference]: Finished difference Result 8550 states and 28635 transitions. [2021-06-05 23:40:38,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:40:38,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:38,778 INFO L225 Difference]: With dead ends: 8550 [2021-06-05 23:40:38,778 INFO L226 Difference]: Without dead ends: 8525 [2021-06-05 23:40:38,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 922.3ms TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:40:38,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2021-06-05 23:40:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 6366. [2021-06-05 23:40:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6366 states, 6365 states have (on average 3.4120974076983503) internal successors, (21718), 6365 states have internal predecessors, (21718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6366 states to 6366 states and 21718 transitions. [2021-06-05 23:40:38,910 INFO L78 Accepts]: Start accepts. Automaton has 6366 states and 21718 transitions. Word has length 30 [2021-06-05 23:40:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:38,910 INFO L482 AbstractCegarLoop]: Abstraction has 6366 states and 21718 transitions. [2021-06-05 23:40:38,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 6366 states and 21718 transitions. [2021-06-05 23:40:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:38,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:38,919 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:39,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 23:40:39,119 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:39,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1366348758, now seen corresponding path program 57 times [2021-06-05 23:40:39,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:39,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736871188] [2021-06-05 23:40:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:39,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:39,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736871188] [2021-06-05 23:40:39,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736871188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:39,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256823929] [2021-06-05 23:40:39,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:40:39,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:40:39,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:39,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:40:39,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:39,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:39,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 23:40:39,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:40:39,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:39,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:39,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:274 [2021-06-05 23:40:39,935 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-05 23:40:40,178 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 23:40:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:40,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256823929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:40,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:40,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 23:40:40,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228634706] [2021-06-05 23:40:40,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:40:40,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:40,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:40:40,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:40:40,338 INFO L87 Difference]: Start difference. First operand 6366 states and 21718 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:41,863 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 23:40:42,034 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2021-06-05 23:40:42,391 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-05 23:40:42,635 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 23:40:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:42,936 INFO L93 Difference]: Finished difference Result 8916 states and 29779 transitions. [2021-06-05 23:40:42,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:40:42,936 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:42,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:42,950 INFO L225 Difference]: With dead ends: 8916 [2021-06-05 23:40:42,950 INFO L226 Difference]: Without dead ends: 8853 [2021-06-05 23:40:42,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2501.7ms TimeCoverageRelationStatistics Valid=314, Invalid=2136, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:40:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2021-06-05 23:40:43,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 6375. [2021-06-05 23:40:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6375 states, 6374 states have (on average 3.41214308126765) internal successors, (21749), 6374 states have internal predecessors, (21749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6375 states to 6375 states and 21749 transitions. [2021-06-05 23:40:43,053 INFO L78 Accepts]: Start accepts. Automaton has 6375 states and 21749 transitions. Word has length 30 [2021-06-05 23:40:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:43,053 INFO L482 AbstractCegarLoop]: Abstraction has 6375 states and 21749 transitions. [2021-06-05 23:40:43,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 6375 states and 21749 transitions. [2021-06-05 23:40:43,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:43,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:43,061 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:43,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:43,264 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:43,264 INFO L82 PathProgramCache]: Analyzing trace with hash 764161106, now seen corresponding path program 58 times [2021-06-05 23:40:43,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:43,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014681812] [2021-06-05 23:40:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:43,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:43,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014681812] [2021-06-05 23:40:43,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014681812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:43,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906389083] [2021-06-05 23:40:43,552 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:40:43,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:43,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:43,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:40:43,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:43,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:43,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:43,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:40:43,749 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:40:43,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:43,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:43,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 23:40:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:43,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906389083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:43,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:43,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 23:40:43,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893463341] [2021-06-05 23:40:43,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:40:43,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:43,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:40:43,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:40:43,831 INFO L87 Difference]: Start difference. First operand 6375 states and 21749 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:44,913 INFO L93 Difference]: Finished difference Result 8258 states and 27729 transitions. [2021-06-05 23:40:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:40:44,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:44,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:44,927 INFO L225 Difference]: With dead ends: 8258 [2021-06-05 23:40:44,927 INFO L226 Difference]: Without dead ends: 8233 [2021-06-05 23:40:44,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 892.6ms TimeCoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:40:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8233 states. [2021-06-05 23:40:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8233 to 6373. [2021-06-05 23:40:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6372 states have (on average 3.412272441933459) internal successors, (21743), 6372 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 21743 transitions. [2021-06-05 23:40:45,035 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 21743 transitions. Word has length 30 [2021-06-05 23:40:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:45,035 INFO L482 AbstractCegarLoop]: Abstraction has 6373 states and 21743 transitions. [2021-06-05 23:40:45,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 21743 transitions. [2021-06-05 23:40:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:45,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:45,044 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:45,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:45,249 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:45,249 INFO L82 PathProgramCache]: Analyzing trace with hash -175548318, now seen corresponding path program 59 times [2021-06-05 23:40:45,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:45,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086436081] [2021-06-05 23:40:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:45,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:45,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086436081] [2021-06-05 23:40:45,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086436081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:45,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294251640] [2021-06-05 23:40:45,598 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 [2021-06-05 23:40:45,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:40:45,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:40:45,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:45,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:45,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:45,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:40:45,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:45,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:45,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:45,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-05 23:40:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:45,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294251640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:45,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:45,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-05 23:40:45,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676375314] [2021-06-05 23:40:45,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:40:45,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:45,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:40:45,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:40:45,857 INFO L87 Difference]: Start difference. First operand 6373 states and 21743 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:48,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:48,537 INFO L93 Difference]: Finished difference Result 8585 states and 28565 transitions. [2021-06-05 23:40:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 23:40:48,538 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:48,552 INFO L225 Difference]: With dead ends: 8585 [2021-06-05 23:40:48,552 INFO L226 Difference]: Without dead ends: 8570 [2021-06-05 23:40:48,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2150.2ms TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:40:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2021-06-05 23:40:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 6394. [2021-06-05 23:40:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 3.4135773502268107) internal successors, (21823), 6393 states have internal predecessors, (21823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 21823 transitions. [2021-06-05 23:40:48,671 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 21823 transitions. Word has length 30 [2021-06-05 23:40:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:48,672 INFO L482 AbstractCegarLoop]: Abstraction has 6394 states and 21823 transitions. [2021-06-05 23:40:48,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:48,672 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 21823 transitions. [2021-06-05 23:40:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:48,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:48,682 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:48,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:48,882 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:48,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1737022281, now seen corresponding path program 26 times [2021-06-05 23:40:48,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:48,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787549782] [2021-06-05 23:40:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:49,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787549782] [2021-06-05 23:40:49,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787549782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714878084] [2021-06-05 23:40:49,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:40:49,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:49,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:49,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:40:49,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:49,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:49,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:49,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:49,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:40:49,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:40:49,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:49,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:49,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:49,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:40:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:49,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714878084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:49,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:49,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 23:40:49,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715724984] [2021-06-05 23:40:49,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:40:49,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:49,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:40:49,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:40:49,754 INFO L87 Difference]: Start difference. First operand 6394 states and 21823 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:55,010 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-06-05 23:40:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:55,545 INFO L93 Difference]: Finished difference Result 8768 states and 28896 transitions. [2021-06-05 23:40:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 23:40:55,545 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:55,559 INFO L225 Difference]: With dead ends: 8768 [2021-06-05 23:40:55,559 INFO L226 Difference]: Without dead ends: 8735 [2021-06-05 23:40:55,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3330 ImplicationChecksByTransitivity, 4749.8ms TimeCoverageRelationStatistics Valid=1406, Invalid=8694, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 23:40:55,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8735 states. [2021-06-05 23:40:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8735 to 6450. [2021-06-05 23:40:55,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 3.4129322375562103) internal successors, (22010), 6449 states have internal predecessors, (22010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 22010 transitions. [2021-06-05 23:40:55,663 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 22010 transitions. Word has length 30 [2021-06-05 23:40:55,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:55,663 INFO L482 AbstractCegarLoop]: Abstraction has 6450 states and 22010 transitions. [2021-06-05 23:40:55,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 22010 transitions. [2021-06-05 23:40:55,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:55,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:55,671 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:55,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:55,872 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:55,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1248501593, now seen corresponding path program 27 times [2021-06-05 23:40:55,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:55,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312836319] [2021-06-05 23:40:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:56,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:56,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312836319] [2021-06-05 23:40:56,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312836319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:56,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013947152] [2021-06-05 23:40:56,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:40:56,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:40:56,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:56,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:40:56,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:56,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:56,482 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 23:40:56,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 78 [2021-06-05 23:40:56,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:56,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:56,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:56,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:18 [2021-06-05 23:40:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:56,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013947152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:56,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:56,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 23:40:56,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209603528] [2021-06-05 23:40:56,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:40:56,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:56,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:40:56,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:40:56,591 INFO L87 Difference]: Start difference. First operand 6450 states and 22010 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:57,876 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 23:40:58,969 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-05 23:40:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:59,672 INFO L93 Difference]: Finished difference Result 10387 states and 34070 transitions. [2021-06-05 23:40:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:40:59,672 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:40:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:59,688 INFO L225 Difference]: With dead ends: 10387 [2021-06-05 23:40:59,688 INFO L226 Difference]: Without dead ends: 10372 [2021-06-05 23:40:59,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 2548.2ms TimeCoverageRelationStatistics Valid=647, Invalid=4465, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:40:59,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10372 states. [2021-06-05 23:40:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10372 to 6469. [2021-06-05 23:40:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6469 states, 6468 states have (on average 3.41017316017316) internal successors, (22057), 6468 states have internal predecessors, (22057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6469 states to 6469 states and 22057 transitions. [2021-06-05 23:40:59,801 INFO L78 Accepts]: Start accepts. Automaton has 6469 states and 22057 transitions. Word has length 30 [2021-06-05 23:40:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:59,801 INFO L482 AbstractCegarLoop]: Abstraction has 6469 states and 22057 transitions. [2021-06-05 23:40:59,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 6469 states and 22057 transitions. [2021-06-05 23:40:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:40:59,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:59,809 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:00,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:00,009 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1869142242, now seen corresponding path program 60 times [2021-06-05 23:41:00,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:00,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801484009] [2021-06-05 23:41:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:00,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:00,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801484009] [2021-06-05 23:41:00,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801484009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:00,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021343409] [2021-06-05 23:41:00,352 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 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 [2021-06-05 23:41:00,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:41:00,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:00,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:41:00,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:00,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:00,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:00,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:41:00,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:41:00,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:00,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:00,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:142 [2021-06-05 23:41:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:00,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021343409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:00,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:00,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 23:41:00,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491631810] [2021-06-05 23:41:00,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:41:00,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:00,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:41:00,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:41:00,818 INFO L87 Difference]: Start difference. First operand 6469 states and 22057 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:02,965 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 23:41:03,196 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-05 23:41:03,455 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-06-05 23:41:03,623 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 23:41:04,187 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-05 23:41:05,421 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-06-05 23:41:05,556 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-06-05 23:41:05,960 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-05 23:41:06,884 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-06-05 23:41:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:07,606 INFO L93 Difference]: Finished difference Result 9384 states and 30854 transitions. [2021-06-05 23:41:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 23:41:07,607 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:07,620 INFO L225 Difference]: With dead ends: 9384 [2021-06-05 23:41:07,621 INFO L226 Difference]: Without dead ends: 9343 [2021-06-05 23:41:07,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3771 ImplicationChecksByTransitivity, 6074.8ms TimeCoverageRelationStatistics Valid=1325, Invalid=9181, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 23:41:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9343 states. [2021-06-05 23:41:07,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9343 to 6512. [2021-06-05 23:41:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6511 states have (on average 3.412225464598372) internal successors, (22217), 6511 states have internal predecessors, (22217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 22217 transitions. [2021-06-05 23:41:07,727 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 22217 transitions. Word has length 30 [2021-06-05 23:41:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:07,728 INFO L482 AbstractCegarLoop]: Abstraction has 6512 states and 22217 transitions. [2021-06-05 23:41:07,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 22217 transitions. [2021-06-05 23:41:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:07,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:07,735 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:07,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:07,936 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:07,936 INFO L82 PathProgramCache]: Analyzing trace with hash -257494774, now seen corresponding path program 61 times [2021-06-05 23:41:07,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:07,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867450491] [2021-06-05 23:41:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:08,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:08,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867450491] [2021-06-05 23:41:08,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867450491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:08,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104265804] [2021-06-05 23:41:08,243 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 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 [2021-06-05 23:41:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:08,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:41:08,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:08,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:08,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:08,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:41:08,437 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:41:08,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:08,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:08,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:41:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:08,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104265804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:08,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:08,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:41:08,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686505250] [2021-06-05 23:41:08,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:41:08,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:08,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:41:08,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:41:08,488 INFO L87 Difference]: Start difference. First operand 6512 states and 22217 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:12,790 INFO L93 Difference]: Finished difference Result 9850 states and 32506 transitions. [2021-06-05 23:41:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 23:41:12,791 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:12,805 INFO L225 Difference]: With dead ends: 9850 [2021-06-05 23:41:12,805 INFO L226 Difference]: Without dead ends: 9812 [2021-06-05 23:41:12,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 3478.2ms TimeCoverageRelationStatistics Valid=970, Invalid=5836, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 23:41:12,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9812 states. [2021-06-05 23:41:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9812 to 6527. [2021-06-05 23:41:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6527 states, 6526 states have (on average 3.4121973643885997) internal successors, (22268), 6526 states have internal predecessors, (22268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 22268 transitions. [2021-06-05 23:41:12,953 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 22268 transitions. Word has length 30 [2021-06-05 23:41:12,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:12,954 INFO L482 AbstractCegarLoop]: Abstraction has 6527 states and 22268 transitions. [2021-06-05 23:41:12,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 22268 transitions. [2021-06-05 23:41:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:12,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:12,961 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:13,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 23:41:13,163 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:13,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:13,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1531873319, now seen corresponding path program 28 times [2021-06-05 23:41:13,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:13,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088144671] [2021-06-05 23:41:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:13,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:13,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088144671] [2021-06-05 23:41:13,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088144671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:13,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842083009] [2021-06-05 23:41:13,444 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:41:13,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:41:13,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:13,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:41:13,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:13,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:13,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:13,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:13,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:13,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:41:13,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:13,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:13,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:13,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:41:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:13,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842083009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:13,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:13,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 23:41:13,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880370109] [2021-06-05 23:41:13,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:41:13,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:13,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:41:13,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:41:13,680 INFO L87 Difference]: Start difference. First operand 6527 states and 22268 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:16,722 INFO L93 Difference]: Finished difference Result 10842 states and 35758 transitions. [2021-06-05 23:41:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:41:16,722 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:16,739 INFO L225 Difference]: With dead ends: 10842 [2021-06-05 23:41:16,739 INFO L226 Difference]: Without dead ends: 10821 [2021-06-05 23:41:16,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2359.0ms TimeCoverageRelationStatistics Valid=747, Invalid=4509, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:41:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10821 states. [2021-06-05 23:41:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10821 to 6634. [2021-06-05 23:41:16,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6634 states, 6633 states have (on average 3.4168551183476557) internal successors, (22664), 6633 states have internal predecessors, (22664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6634 states to 6634 states and 22664 transitions. [2021-06-05 23:41:16,868 INFO L78 Accepts]: Start accepts. Automaton has 6634 states and 22664 transitions. Word has length 30 [2021-06-05 23:41:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:16,869 INFO L482 AbstractCegarLoop]: Abstraction has 6634 states and 22664 transitions. [2021-06-05 23:41:16,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 6634 states and 22664 transitions. [2021-06-05 23:41:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:16,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:16,877 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:17,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:17,078 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:17,078 INFO L82 PathProgramCache]: Analyzing trace with hash 241234517, now seen corresponding path program 29 times [2021-06-05 23:41:17,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:17,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388984192] [2021-06-05 23:41:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:17,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:17,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388984192] [2021-06-05 23:41:17,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388984192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:17,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130291837] [2021-06-05 23:41:17,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:41:17,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:41:17,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:17,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:41:17,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:17,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:17,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:17,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:17,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 23:41:17,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:41:17,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:17,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:17,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 23:41:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:17,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130291837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:17,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:17,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 23:41:17,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870282076] [2021-06-05 23:41:17,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:41:17,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:17,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:41:17,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:41:17,624 INFO L87 Difference]: Start difference. First operand 6634 states and 22664 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:18,759 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-05 23:41:20,527 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 23:41:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:21,891 INFO L93 Difference]: Finished difference Result 11958 states and 39090 transitions. [2021-06-05 23:41:21,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 23:41:21,891 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:21,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:21,910 INFO L225 Difference]: With dead ends: 11958 [2021-06-05 23:41:21,910 INFO L226 Difference]: Without dead ends: 11901 [2021-06-05 23:41:21,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2838 ImplicationChecksByTransitivity, 3508.9ms TimeCoverageRelationStatistics Valid=1317, Invalid=7239, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 23:41:21,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11901 states. [2021-06-05 23:41:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11901 to 6665. [2021-06-05 23:41:22,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 3.4191176470588234) internal successors, (22785), 6664 states have internal predecessors, (22785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 22785 transitions. [2021-06-05 23:41:22,084 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 22785 transitions. Word has length 30 [2021-06-05 23:41:22,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:22,084 INFO L482 AbstractCegarLoop]: Abstraction has 6665 states and 22785 transitions. [2021-06-05 23:41:22,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:22,084 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 22785 transitions. [2021-06-05 23:41:22,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:22,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:22,092 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:22,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-05 23:41:22,293 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:22,293 INFO L82 PathProgramCache]: Analyzing trace with hash -49932476, now seen corresponding path program 62 times [2021-06-05 23:41:22,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:22,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876444007] [2021-06-05 23:41:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:22,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:22,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876444007] [2021-06-05 23:41:22,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876444007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:22,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137932878] [2021-06-05 23:41:22,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:41:22,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:41:22,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:22,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:41:22,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:22,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:22,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:41:22,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:41:22,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:22,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:22,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:127 [2021-06-05 23:41:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:22,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137932878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:22,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:22,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 23:41:22,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807935690] [2021-06-05 23:41:22,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:41:22,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:22,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:41:22,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:41:22,958 INFO L87 Difference]: Start difference. First operand 6665 states and 22785 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:25,151 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-05 23:41:25,576 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 23:41:26,721 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-05 23:41:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:28,278 INFO L93 Difference]: Finished difference Result 9555 states and 31508 transitions. [2021-06-05 23:41:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:41:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:28,294 INFO L225 Difference]: With dead ends: 9555 [2021-06-05 23:41:28,294 INFO L226 Difference]: Without dead ends: 9497 [2021-06-05 23:41:28,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 4213.1ms TimeCoverageRelationStatistics Valid=997, Invalid=7745, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 23:41:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-06-05 23:41:28,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 6661. [2021-06-05 23:41:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 3.4181681681681684) internal successors, (22765), 6660 states have internal predecessors, (22765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 22765 transitions. [2021-06-05 23:41:28,439 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 22765 transitions. Word has length 30 [2021-06-05 23:41:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:28,439 INFO L482 AbstractCegarLoop]: Abstraction has 6661 states and 22765 transitions. [2021-06-05 23:41:28,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 22765 transitions. [2021-06-05 23:41:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:28,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:28,447 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:28,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 23:41:28,647 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:28,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1734813122, now seen corresponding path program 63 times [2021-06-05 23:41:28,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:28,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098727265] [2021-06-05 23:41:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:28,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:28,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098727265] [2021-06-05 23:41:28,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098727265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:28,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328898829] [2021-06-05 23:41:28,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:41:28,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:41:28,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:28,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:41:28,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:29,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:29,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:41:29,093 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:41:29,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:29,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:29,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:41:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:29,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328898829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:29,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:29,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:41:29,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354272248] [2021-06-05 23:41:29,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:41:29,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:29,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:41:29,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:41:29,162 INFO L87 Difference]: Start difference. First operand 6661 states and 22765 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:32,416 INFO L93 Difference]: Finished difference Result 9025 states and 30264 transitions. [2021-06-05 23:41:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 23:41:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:32,429 INFO L225 Difference]: With dead ends: 9025 [2021-06-05 23:41:32,429 INFO L226 Difference]: Without dead ends: 9000 [2021-06-05 23:41:32,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 2645.3ms TimeCoverageRelationStatistics Valid=655, Invalid=4457, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:41:32,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9000 states. [2021-06-05 23:41:32,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9000 to 6636. [2021-06-05 23:41:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6636 states, 6635 states have (on average 3.417633760361718) internal successors, (22676), 6635 states have internal predecessors, (22676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:32,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6636 states to 6636 states and 22676 transitions. [2021-06-05 23:41:32,530 INFO L78 Accepts]: Start accepts. Automaton has 6636 states and 22676 transitions. Word has length 30 [2021-06-05 23:41:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:32,530 INFO L482 AbstractCegarLoop]: Abstraction has 6636 states and 22676 transitions. [2021-06-05 23:41:32,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 6636 states and 22676 transitions. [2021-06-05 23:41:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:32,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:32,538 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:32,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:32,739 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:32,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:32,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1517125215, now seen corresponding path program 30 times [2021-06-05 23:41:32,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:32,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44777474] [2021-06-05 23:41:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:33,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:33,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44777474] [2021-06-05 23:41:33,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44777474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:33,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274597482] [2021-06-05 23:41:33,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:41:33,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:41:33,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:41:33,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:33,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:33,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:33,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:33,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 23:41:33,382 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:41:33,402 INFO L628 ElimStorePlain]: treesize reduction 45, result has 28.6 percent of original size [2021-06-05 23:41:33,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:33,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 23:41:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:33,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274597482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:33,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:33,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:41:33,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55212182] [2021-06-05 23:41:33,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:41:33,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:33,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:41:33,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:41:33,478 INFO L87 Difference]: Start difference. First operand 6636 states and 22676 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:37,616 INFO L93 Difference]: Finished difference Result 9140 states and 30189 transitions. [2021-06-05 23:41:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:41:37,617 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:37,631 INFO L225 Difference]: With dead ends: 9140 [2021-06-05 23:41:37,631 INFO L226 Difference]: Without dead ends: 9091 [2021-06-05 23:41:37,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 3323.7ms TimeCoverageRelationStatistics Valid=953, Invalid=6529, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 23:41:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9091 states. [2021-06-05 23:41:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9091 to 6597. [2021-06-05 23:41:37,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6597 states, 6596 states have (on average 3.4181322013341418) internal successors, (22546), 6596 states have internal predecessors, (22546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6597 states to 6597 states and 22546 transitions. [2021-06-05 23:41:37,759 INFO L78 Accepts]: Start accepts. Automaton has 6597 states and 22546 transitions. Word has length 30 [2021-06-05 23:41:37,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:37,759 INFO L482 AbstractCegarLoop]: Abstraction has 6597 states and 22546 transitions. [2021-06-05 23:41:37,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:37,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6597 states and 22546 transitions. [2021-06-05 23:41:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:37,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:37,767 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:37,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:37,968 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:37,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1193558822, now seen corresponding path program 64 times [2021-06-05 23:41:37,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:37,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543001910] [2021-06-05 23:41:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:38,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:38,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543001910] [2021-06-05 23:41:38,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543001910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:38,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678644893] [2021-06-05 23:41:38,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:41:38,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:41:38,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:38,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:41:38,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:38,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:38,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:38,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:41:38,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:38,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:38,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:38,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:41:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:38,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678644893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:38,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:38,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:41:38,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215913172] [2021-06-05 23:41:38,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:41:38,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:38,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:41:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:41:38,495 INFO L87 Difference]: Start difference. First operand 6597 states and 22546 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:41,372 INFO L93 Difference]: Finished difference Result 8362 states and 28087 transitions. [2021-06-05 23:41:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:41:41,372 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:41,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:41,385 INFO L225 Difference]: With dead ends: 8362 [2021-06-05 23:41:41,385 INFO L226 Difference]: Without dead ends: 8347 [2021-06-05 23:41:41,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2361.4ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:41:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8347 states. [2021-06-05 23:41:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8347 to 6603. [2021-06-05 23:41:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6603 states, 6602 states have (on average 3.4180551348076342) internal successors, (22566), 6602 states have internal predecessors, (22566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6603 states to 6603 states and 22566 transitions. [2021-06-05 23:41:41,481 INFO L78 Accepts]: Start accepts. Automaton has 6603 states and 22566 transitions. Word has length 30 [2021-06-05 23:41:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:41,481 INFO L482 AbstractCegarLoop]: Abstraction has 6603 states and 22566 transitions. [2021-06-05 23:41:41,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 6603 states and 22566 transitions. [2021-06-05 23:41:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:41,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:41,489 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:41,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 23:41:41,690 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:41,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:41,690 INFO L82 PathProgramCache]: Analyzing trace with hash 611989314, now seen corresponding path program 65 times [2021-06-05 23:41:41,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:41,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593231267] [2021-06-05 23:41:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:41,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:41,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593231267] [2021-06-05 23:41:41,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593231267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:41,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855791175] [2021-06-05 23:41:41,966 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 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 [2021-06-05 23:41:41,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:41:41,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:41,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:41:41,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:42,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:42,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:42,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:41:42,116 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:41:42,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:42,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:42,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:41:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:42,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855791175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:42,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:42,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:41:42,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907714594] [2021-06-05 23:41:42,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:41:42,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:42,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:41:42,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:41:42,185 INFO L87 Difference]: Start difference. First operand 6603 states and 22566 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:46,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:46,043 INFO L93 Difference]: Finished difference Result 9359 states and 31301 transitions. [2021-06-05 23:41:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:41:46,043 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:46,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:46,058 INFO L225 Difference]: With dead ends: 9359 [2021-06-05 23:41:46,058 INFO L226 Difference]: Without dead ends: 9312 [2021-06-05 23:41:46,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 3101.3ms TimeCoverageRelationStatistics Valid=790, Invalid=5372, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:41:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9312 states. [2021-06-05 23:41:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9312 to 6619. [2021-06-05 23:41:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6619 states, 6618 states have (on average 3.4177999395587793) internal successors, (22619), 6618 states have internal predecessors, (22619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6619 states to 6619 states and 22619 transitions. [2021-06-05 23:41:46,172 INFO L78 Accepts]: Start accepts. Automaton has 6619 states and 22619 transitions. Word has length 30 [2021-06-05 23:41:46,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:46,172 INFO L482 AbstractCegarLoop]: Abstraction has 6619 states and 22619 transitions. [2021-06-05 23:41:46,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 6619 states and 22619 transitions. [2021-06-05 23:41:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:46,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:46,181 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:46,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 23:41:46,389 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:46,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:46,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1029376390, now seen corresponding path program 66 times [2021-06-05 23:41:46,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:46,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427984521] [2021-06-05 23:41:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:46,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:46,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427984521] [2021-06-05 23:41:46,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427984521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:46,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453881816] [2021-06-05 23:41:46,658 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 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 [2021-06-05 23:41:46,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:41:46,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:46,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:41:46,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:46,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:46,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:41:46,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:41:46,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:46,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:46,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:125 [2021-06-05 23:41:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:47,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453881816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:47,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:47,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 23:41:47,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406593808] [2021-06-05 23:41:47,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:41:47,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:47,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:41:47,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:41:47,078 INFO L87 Difference]: Start difference. First operand 6619 states and 22619 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:49,318 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 23:41:49,669 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 23:41:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:52,089 INFO L93 Difference]: Finished difference Result 9450 states and 31390 transitions. [2021-06-05 23:41:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:41:52,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:52,105 INFO L225 Difference]: With dead ends: 9450 [2021-06-05 23:41:52,105 INFO L226 Difference]: Without dead ends: 9389 [2021-06-05 23:41:52,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 4169.0ms TimeCoverageRelationStatistics Valid=875, Invalid=6607, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 23:41:52,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9389 states. [2021-06-05 23:41:52,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9389 to 6626. [2021-06-05 23:41:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6626 states, 6625 states have (on average 3.4176603773584904) internal successors, (22642), 6625 states have internal predecessors, (22642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6626 states to 6626 states and 22642 transitions. [2021-06-05 23:41:52,229 INFO L78 Accepts]: Start accepts. Automaton has 6626 states and 22642 transitions. Word has length 30 [2021-06-05 23:41:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:52,229 INFO L482 AbstractCegarLoop]: Abstraction has 6626 states and 22642 transitions. [2021-06-05 23:41:52,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6626 states and 22642 transitions. [2021-06-05 23:41:52,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:52,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:52,238 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:52,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:52,439 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:52,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1086081622, now seen corresponding path program 67 times [2021-06-05 23:41:52,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:52,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404080743] [2021-06-05 23:41:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:52,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:52,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404080743] [2021-06-05 23:41:52,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404080743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:52,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345222202] [2021-06-05 23:41:52,698 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 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 [2021-06-05 23:41:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:52,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:41:52,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:52,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:52,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:52,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:52,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:52,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:52,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-05 23:41:52,885 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:41:52,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:52,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:52,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-05 23:41:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:52,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345222202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:52,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:52,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 23:41:52,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533234223] [2021-06-05 23:41:52,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:41:52,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:52,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:41:52,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:41:52,964 INFO L87 Difference]: Start difference. First operand 6626 states and 22642 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:54,760 INFO L93 Difference]: Finished difference Result 8651 states and 29045 transitions. [2021-06-05 23:41:54,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:41:54,760 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:54,774 INFO L225 Difference]: With dead ends: 8651 [2021-06-05 23:41:54,775 INFO L226 Difference]: Without dead ends: 8626 [2021-06-05 23:41:54,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1264.8ms TimeCoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:41:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-06-05 23:41:54,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 6640. [2021-06-05 23:41:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6640 states, 6639 states have (on average 3.4181352613345384) internal successors, (22693), 6639 states have internal predecessors, (22693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6640 states to 6640 states and 22693 transitions. [2021-06-05 23:41:54,873 INFO L78 Accepts]: Start accepts. Automaton has 6640 states and 22693 transitions. Word has length 30 [2021-06-05 23:41:54,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:54,873 INFO L482 AbstractCegarLoop]: Abstraction has 6640 states and 22693 transitions. [2021-06-05 23:41:54,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6640 states and 22693 transitions. [2021-06-05 23:41:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:54,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:54,880 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:55,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:55,081 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:55,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1576250863, now seen corresponding path program 31 times [2021-06-05 23:41:55,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:55,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617147405] [2021-06-05 23:41:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:55,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:55,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617147405] [2021-06-05 23:41:55,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617147405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:55,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014697474] [2021-06-05 23:41:55,493 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 [2021-06-05 23:41:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:55,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:41:55,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:55,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:55,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:41:55,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:55,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:41:55,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:41:55,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:55,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:55,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:55,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:41:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:55,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014697474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:55,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:55,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:41:55,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624949694] [2021-06-05 23:41:55,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:41:55,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:55,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:41:55,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:41:55,725 INFO L87 Difference]: Start difference. First operand 6640 states and 22693 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:59,106 INFO L93 Difference]: Finished difference Result 8380 states and 27963 transitions. [2021-06-05 23:41:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:41:59,106 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:41:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:59,120 INFO L225 Difference]: With dead ends: 8380 [2021-06-05 23:41:59,120 INFO L226 Difference]: Without dead ends: 8358 [2021-06-05 23:41:59,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 3008.0ms TimeCoverageRelationStatistics Valid=897, Invalid=5909, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 23:41:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-06-05 23:41:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 6638. [2021-06-05 23:41:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6638 states, 6637 states have (on average 3.418411933102305) internal successors, (22688), 6637 states have internal predecessors, (22688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 22688 transitions. [2021-06-05 23:41:59,253 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 22688 transitions. Word has length 30 [2021-06-05 23:41:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:59,253 INFO L482 AbstractCegarLoop]: Abstraction has 6638 states and 22688 transitions. [2021-06-05 23:41:59,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 22688 transitions. [2021-06-05 23:41:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:41:59,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:59,262 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:59,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 23:41:59,463 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:59,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:59,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1302931307, now seen corresponding path program 32 times [2021-06-05 23:41:59,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:59,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427535169] [2021-06-05 23:41:59,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:59,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:59,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427535169] [2021-06-05 23:41:59,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427535169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:59,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677055770] [2021-06-05 23:41:59,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:41:59,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:41:59,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:59,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:41:59,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:00,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:00,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:00,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-06-05 23:42:00,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:42:00,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:00,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:00,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:20 [2021-06-05 23:42:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:00,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677055770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:00,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:00,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:42:00,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576423920] [2021-06-05 23:42:00,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:42:00,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:00,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:42:00,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:42:00,165 INFO L87 Difference]: Start difference. First operand 6638 states and 22688 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:02,450 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 23:42:03,130 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 23:42:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:06,520 INFO L93 Difference]: Finished difference Result 10721 states and 35147 transitions. [2021-06-05 23:42:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:42:06,520 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:06,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:06,536 INFO L225 Difference]: With dead ends: 10721 [2021-06-05 23:42:06,537 INFO L226 Difference]: Without dead ends: 10673 [2021-06-05 23:42:06,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3739 ImplicationChecksByTransitivity, 5277.7ms TimeCoverageRelationStatistics Valid=1470, Invalid=10740, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 23:42:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2021-06-05 23:42:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 6649. [2021-06-05 23:42:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6649 states, 6648 states have (on average 3.417870036101083) internal successors, (22722), 6648 states have internal predecessors, (22722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6649 states to 6649 states and 22722 transitions. [2021-06-05 23:42:06,669 INFO L78 Accepts]: Start accepts. Automaton has 6649 states and 22722 transitions. Word has length 30 [2021-06-05 23:42:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:06,669 INFO L482 AbstractCegarLoop]: Abstraction has 6649 states and 22722 transitions. [2021-06-05 23:42:06,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:06,669 INFO L276 IsEmpty]: Start isEmpty. Operand 6649 states and 22722 transitions. [2021-06-05 23:42:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:06,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:06,678 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:06,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:06,879 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:06,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:06,879 INFO L82 PathProgramCache]: Analyzing trace with hash 276275861, now seen corresponding path program 33 times [2021-06-05 23:42:06,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:06,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338623126] [2021-06-05 23:42:06,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:07,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:07,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338623126] [2021-06-05 23:42:07,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338623126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:07,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410632184] [2021-06-05 23:42:07,309 INFO L93 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 [2021-06-05 23:42:07,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:42:07,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:07,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:42:07,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:07,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:07,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:07,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-06-05 23:42:07,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:42:07,612 INFO L628 ElimStorePlain]: treesize reduction 45, result has 28.6 percent of original size [2021-06-05 23:42:07,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:07,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-06-05 23:42:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:07,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410632184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:07,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:07,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 23:42:07,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411164970] [2021-06-05 23:42:07,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:42:07,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:42:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:42:07,733 INFO L87 Difference]: Start difference. First operand 6649 states and 22722 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:09,535 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 23:42:11,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:11,262 INFO L93 Difference]: Finished difference Result 10431 states and 34548 transitions. [2021-06-05 23:42:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:42:11,262 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:11,279 INFO L225 Difference]: With dead ends: 10431 [2021-06-05 23:42:11,279 INFO L226 Difference]: Without dead ends: 10368 [2021-06-05 23:42:11,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 3038.8ms TimeCoverageRelationStatistics Valid=877, Invalid=5129, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 23:42:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10368 states. [2021-06-05 23:42:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10368 to 6656. [2021-06-05 23:42:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 3.417129977460556) internal successors, (22741), 6655 states have internal predecessors, (22741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 22741 transitions. [2021-06-05 23:42:11,407 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 22741 transitions. Word has length 30 [2021-06-05 23:42:11,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:11,407 INFO L482 AbstractCegarLoop]: Abstraction has 6656 states and 22741 transitions. [2021-06-05 23:42:11,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:11,407 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 22741 transitions. [2021-06-05 23:42:11,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:11,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:11,416 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:11,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:11,616 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:11,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1350859047, now seen corresponding path program 34 times [2021-06-05 23:42:11,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:11,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668473008] [2021-06-05 23:42:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:11,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:11,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668473008] [2021-06-05 23:42:11,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668473008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:11,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716425291] [2021-06-05 23:42:11,967 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:42:11,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:11,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:11,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:42:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:12,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:12,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:12,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:12,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:12,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 23:42:12,189 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:42:12,203 INFO L628 ElimStorePlain]: treesize reduction 15, result has 54.5 percent of original size [2021-06-05 23:42:12,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:12,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2021-06-05 23:42:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:12,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716425291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:12,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:12,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 23:42:12,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366680152] [2021-06-05 23:42:12,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:42:12,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:12,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:42:12,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:42:12,281 INFO L87 Difference]: Start difference. First operand 6656 states and 22741 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:14,352 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-05 23:42:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:15,192 INFO L93 Difference]: Finished difference Result 10017 states and 33312 transitions. [2021-06-05 23:42:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:42:15,192 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:15,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:15,207 INFO L225 Difference]: With dead ends: 10017 [2021-06-05 23:42:15,207 INFO L226 Difference]: Without dead ends: 9945 [2021-06-05 23:42:15,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2464.8ms TimeCoverageRelationStatistics Valid=723, Invalid=4107, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:42:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9945 states. [2021-06-05 23:42:15,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9945 to 6722. [2021-06-05 23:42:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 3.41809254575212) internal successors, (22973), 6721 states have internal predecessors, (22973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 22973 transitions. [2021-06-05 23:42:15,334 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 22973 transitions. Word has length 30 [2021-06-05 23:42:15,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:15,334 INFO L482 AbstractCegarLoop]: Abstraction has 6722 states and 22973 transitions. [2021-06-05 23:42:15,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 22973 transitions. [2021-06-05 23:42:15,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:15,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:15,343 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:15,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 23:42:15,544 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:15,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:15,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1666655007, now seen corresponding path program 35 times [2021-06-05 23:42:15,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:15,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383274637] [2021-06-05 23:42:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:15,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:15,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383274637] [2021-06-05 23:42:15,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383274637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:15,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197244739] [2021-06-05 23:42:15,974 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 [2021-06-05 23:42:16,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:42:16,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:16,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:42:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:16,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:16,259 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 23:42:16,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 50 [2021-06-05 23:42:16,261 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:16,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:16,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:16,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:3 [2021-06-05 23:42:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:16,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197244739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:16,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:16,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 23:42:16,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182936510] [2021-06-05 23:42:16,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:42:16,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:16,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:42:16,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:42:16,284 INFO L87 Difference]: Start difference. First operand 6722 states and 22973 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:21,287 INFO L93 Difference]: Finished difference Result 8927 states and 29552 transitions. [2021-06-05 23:42:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 23:42:21,288 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:21,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:21,300 INFO L225 Difference]: With dead ends: 8927 [2021-06-05 23:42:21,300 INFO L226 Difference]: Without dead ends: 8898 [2021-06-05 23:42:21,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 4218.8ms TimeCoverageRelationStatistics Valid=1157, Invalid=8743, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 23:42:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8898 states. [2021-06-05 23:42:21,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8898 to 6748. [2021-06-05 23:42:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6748 states, 6747 states have (on average 3.4179635393508225) internal successors, (23061), 6747 states have internal predecessors, (23061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6748 states to 6748 states and 23061 transitions. [2021-06-05 23:42:21,429 INFO L78 Accepts]: Start accepts. Automaton has 6748 states and 23061 transitions. Word has length 30 [2021-06-05 23:42:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:21,429 INFO L482 AbstractCegarLoop]: Abstraction has 6748 states and 23061 transitions. [2021-06-05 23:42:21,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 6748 states and 23061 transitions. [2021-06-05 23:42:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:21,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:21,437 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:21,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 23:42:21,638 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:21,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1871803969, now seen corresponding path program 36 times [2021-06-05 23:42:21,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:21,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290944292] [2021-06-05 23:42:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:21,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:21,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290944292] [2021-06-05 23:42:21,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290944292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:21,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407543261] [2021-06-05 23:42:21,920 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 [2021-06-05 23:42:21,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:42:21,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:21,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:42:21,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:22,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:22,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:22,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 43 [2021-06-05 23:42:22,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:42:22,191 INFO L628 ElimStorePlain]: treesize reduction 100, result has 16.7 percent of original size [2021-06-05 23:42:22,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:22,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:20 [2021-06-05 23:42:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:22,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407543261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:22,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:22,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:42:22,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581315773] [2021-06-05 23:42:22,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:42:22,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:22,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:42:22,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:42:22,292 INFO L87 Difference]: Start difference. First operand 6748 states and 23061 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:25,452 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 23:42:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:28,858 INFO L93 Difference]: Finished difference Result 11440 states and 37396 transitions. [2021-06-05 23:42:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 23:42:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:28,875 INFO L225 Difference]: With dead ends: 11440 [2021-06-05 23:42:28,875 INFO L226 Difference]: Without dead ends: 11377 [2021-06-05 23:42:28,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4941 ImplicationChecksByTransitivity, 5414.2ms TimeCoverageRelationStatistics Valid=1803, Invalid=13203, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 23:42:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11377 states. [2021-06-05 23:42:28,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11377 to 6877. [2021-06-05 23:42:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6877 states, 6876 states have (on average 3.4157940663176265) internal successors, (23487), 6876 states have internal predecessors, (23487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6877 states to 6877 states and 23487 transitions. [2021-06-05 23:42:29,012 INFO L78 Accepts]: Start accepts. Automaton has 6877 states and 23487 transitions. Word has length 30 [2021-06-05 23:42:29,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:29,012 INFO L482 AbstractCegarLoop]: Abstraction has 6877 states and 23487 transitions. [2021-06-05 23:42:29,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:29,013 INFO L276 IsEmpty]: Start isEmpty. Operand 6877 states and 23487 transitions. [2021-06-05 23:42:29,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:29,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:29,021 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:29,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 23:42:29,222 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:29,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:29,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1119954797, now seen corresponding path program 37 times [2021-06-05 23:42:29,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:29,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794503997] [2021-06-05 23:42:29,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:29,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:29,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794503997] [2021-06-05 23:42:29,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794503997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:29,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428603338] [2021-06-05 23:42:29,643 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 [2021-06-05 23:42:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:29,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:42:29,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:29,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:29,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:29,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:29,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:29,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:42:29,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:29,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:29,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:29,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-06-05 23:42:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:29,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428603338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:29,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:29,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 23:42:29,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851032814] [2021-06-05 23:42:29,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:42:29,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:29,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:42:29,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:42:29,981 INFO L87 Difference]: Start difference. First operand 6877 states and 23487 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:34,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:34,423 INFO L93 Difference]: Finished difference Result 8722 states and 29097 transitions. [2021-06-05 23:42:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:42:34,423 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:34,437 INFO L225 Difference]: With dead ends: 8722 [2021-06-05 23:42:34,437 INFO L226 Difference]: Without dead ends: 8696 [2021-06-05 23:42:34,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 4029.8ms TimeCoverageRelationStatistics Valid=874, Invalid=6608, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 23:42:34,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8696 states. [2021-06-05 23:42:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8696 to 6874. [2021-06-05 23:42:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.4156845627819004) internal successors, (23476), 6873 states have internal predecessors, (23476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:34,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 23476 transitions. [2021-06-05 23:42:34,550 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 23476 transitions. Word has length 30 [2021-06-05 23:42:34,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:34,550 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 23476 transitions. [2021-06-05 23:42:34,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 23476 transitions. [2021-06-05 23:42:34,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:34,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:34,559 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:34,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:34,759 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:34,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:34,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1353770535, now seen corresponding path program 38 times [2021-06-05 23:42:34,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:34,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251772236] [2021-06-05 23:42:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:35,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:35,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251772236] [2021-06-05 23:42:35,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251772236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:35,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642252176] [2021-06-05 23:42:35,121 INFO L93 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 [2021-06-05 23:42:35,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:35,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:35,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:42:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:35,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:35,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:35,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:35,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:35,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:42:35,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:35,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:35,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:35,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:42:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:35,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642252176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:35,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:35,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:42:35,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148303688] [2021-06-05 23:42:35,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:42:35,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:35,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:42:35,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:42:35,339 INFO L87 Difference]: Start difference. First operand 6874 states and 23476 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:37,485 INFO L93 Difference]: Finished difference Result 8472 states and 28350 transitions. [2021-06-05 23:42:37,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:42:37,486 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:37,501 INFO L225 Difference]: With dead ends: 8472 [2021-06-05 23:42:37,501 INFO L226 Difference]: Without dead ends: 8446 [2021-06-05 23:42:37,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1863.0ms TimeCoverageRelationStatistics Valid=445, Invalid=2861, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:42:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2021-06-05 23:42:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 6874. [2021-06-05 23:42:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.4156845627819004) internal successors, (23476), 6873 states have internal predecessors, (23476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 23476 transitions. [2021-06-05 23:42:37,627 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 23476 transitions. Word has length 30 [2021-06-05 23:42:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:37,627 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 23476 transitions. [2021-06-05 23:42:37,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 23476 transitions. [2021-06-05 23:42:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:37,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:37,638 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:37,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 23:42:37,838 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:37,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:37,838 INFO L82 PathProgramCache]: Analyzing trace with hash -153504787, now seen corresponding path program 39 times [2021-06-05 23:42:37,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:37,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184794626] [2021-06-05 23:42:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:38,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:38,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184794626] [2021-06-05 23:42:38,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184794626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:38,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254594663] [2021-06-05 23:42:38,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:42:38,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:42:38,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:38,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:42:38,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:38,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:38,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:38,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:38,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 23:42:38,402 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:42:38,417 INFO L628 ElimStorePlain]: treesize reduction 19, result has 48.6 percent of original size [2021-06-05 23:42:38,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:38,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 23:42:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:38,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254594663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:38,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:38,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 23:42:38,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272505360] [2021-06-05 23:42:38,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:42:38,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:38,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:42:38,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:42:38,465 INFO L87 Difference]: Start difference. First operand 6874 states and 23476 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:40,747 INFO L93 Difference]: Finished difference Result 9020 states and 29936 transitions. [2021-06-05 23:42:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:42:40,747 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:40,761 INFO L225 Difference]: With dead ends: 9020 [2021-06-05 23:42:40,762 INFO L226 Difference]: Without dead ends: 8964 [2021-06-05 23:42:40,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1787.1ms TimeCoverageRelationStatistics Valid=430, Invalid=3230, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:42:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8964 states. [2021-06-05 23:42:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8964 to 6858. [2021-06-05 23:42:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6858 states, 6857 states have (on average 3.41519614991979) internal successors, (23418), 6857 states have internal predecessors, (23418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 23418 transitions. [2021-06-05 23:42:40,885 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 23418 transitions. Word has length 30 [2021-06-05 23:42:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:40,885 INFO L482 AbstractCegarLoop]: Abstraction has 6858 states and 23418 transitions. [2021-06-05 23:42:40,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:40,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 23418 transitions. [2021-06-05 23:42:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:40,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:40,895 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:41,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 23:42:41,097 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:41,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:41,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1190293913, now seen corresponding path program 40 times [2021-06-05 23:42:41,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:41,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044922045] [2021-06-05 23:42:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:41,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:41,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044922045] [2021-06-05 23:42:41,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044922045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:41,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627544948] [2021-06-05 23:42:41,450 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 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 [2021-06-05 23:42:41,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:41,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:41,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:42:41,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:41,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:41,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:41,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:41,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:41,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:42:41,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:41,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:41,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:41,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-06-05 23:42:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:41,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627544948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:41,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:41,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 23:42:41,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709616099] [2021-06-05 23:42:41,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:42:41,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:41,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:42:41,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:42:41,741 INFO L87 Difference]: Start difference. First operand 6858 states and 23418 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:43,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:43,255 INFO L93 Difference]: Finished difference Result 8455 states and 28275 transitions. [2021-06-05 23:42:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:42:43,255 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:43,267 INFO L225 Difference]: With dead ends: 8455 [2021-06-05 23:42:43,268 INFO L226 Difference]: Without dead ends: 8440 [2021-06-05 23:42:43,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1388.5ms TimeCoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:42:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8440 states. [2021-06-05 23:42:43,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8440 to 6848. [2021-06-05 23:42:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6848 states, 6847 states have (on average 3.416532788082372) internal successors, (23393), 6847 states have internal predecessors, (23393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6848 states to 6848 states and 23393 transitions. [2021-06-05 23:42:43,365 INFO L78 Accepts]: Start accepts. Automaton has 6848 states and 23393 transitions. Word has length 30 [2021-06-05 23:42:43,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:43,365 INFO L482 AbstractCegarLoop]: Abstraction has 6848 states and 23393 transitions. [2021-06-05 23:42:43,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 6848 states and 23393 transitions. [2021-06-05 23:42:43,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:43,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:43,373 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:43,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:43,574 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:43,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:43,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1093552081, now seen corresponding path program 41 times [2021-06-05 23:42:43,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:43,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907248817] [2021-06-05 23:42:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:43,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907248817] [2021-06-05 23:42:43,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907248817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279382023] [2021-06-05 23:42:43,921 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 [2021-06-05 23:42:43,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:42:43,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:43,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:42:43,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:44,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:44,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:44,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 23:42:44,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:42:44,156 INFO L628 ElimStorePlain]: treesize reduction 26, result has 40.9 percent of original size [2021-06-05 23:42:44,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:44,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-05 23:42:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:44,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279382023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:44,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:44,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:42:44,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603810836] [2021-06-05 23:42:44,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:42:44,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:44,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:42:44,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:42:44,235 INFO L87 Difference]: Start difference. First operand 6848 states and 23393 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:46,108 INFO L93 Difference]: Finished difference Result 8682 states and 29011 transitions. [2021-06-05 23:42:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:42:46,109 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:46,123 INFO L225 Difference]: With dead ends: 8682 [2021-06-05 23:42:46,123 INFO L226 Difference]: Without dead ends: 8637 [2021-06-05 23:42:46,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1527.8ms TimeCoverageRelationStatistics Valid=350, Invalid=2620, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:42:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2021-06-05 23:42:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 6836. [2021-06-05 23:42:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 3.417556693489393) internal successors, (23359), 6835 states have internal predecessors, (23359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 23359 transitions. [2021-06-05 23:42:46,242 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 23359 transitions. Word has length 30 [2021-06-05 23:42:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:46,242 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 23359 transitions. [2021-06-05 23:42:46,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 23359 transitions. [2021-06-05 23:42:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:46,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:46,253 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:46,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:46,453 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:46,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1107184069, now seen corresponding path program 42 times [2021-06-05 23:42:46,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:46,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245614296] [2021-06-05 23:42:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:46,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:46,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245614296] [2021-06-05 23:42:46,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245614296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:46,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618746156] [2021-06-05 23:42:46,768 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 [2021-06-05 23:42:46,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:42:46,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:46,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:42:46,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:47,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:47,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:47,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:47,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:47,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:42:47,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:47,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:47,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:47,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:42:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:47,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618746156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:47,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:47,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 23:42:47,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056633771] [2021-06-05 23:42:47,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:42:47,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:47,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:42:47,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:42:47,050 INFO L87 Difference]: Start difference. First operand 6836 states and 23359 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:48,108 INFO L93 Difference]: Finished difference Result 8350 states and 28001 transitions. [2021-06-05 23:42:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:42:48,109 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:48,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:48,124 INFO L225 Difference]: With dead ends: 8350 [2021-06-05 23:42:48,124 INFO L226 Difference]: Without dead ends: 8335 [2021-06-05 23:42:48,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1124.4ms TimeCoverageRelationStatistics Valid=412, Invalid=2450, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:42:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2021-06-05 23:42:48,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 6836. [2021-06-05 23:42:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 3.417556693489393) internal successors, (23359), 6835 states have internal predecessors, (23359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 23359 transitions. [2021-06-05 23:42:48,235 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 23359 transitions. Word has length 30 [2021-06-05 23:42:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:48,235 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 23359 transitions. [2021-06-05 23:42:48,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 23359 transitions. [2021-06-05 23:42:48,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:48,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:48,246 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:48,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 23:42:48,461 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:48,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1610082335, now seen corresponding path program 43 times [2021-06-05 23:42:48,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:48,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616807941] [2021-06-05 23:42:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:48,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:48,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616807941] [2021-06-05 23:42:48,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616807941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:48,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849151780] [2021-06-05 23:42:48,944 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 [2021-06-05 23:42:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:48,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:42:48,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:49,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:49,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:49,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:49,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:49,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:42:49,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:49,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:49,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:49,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:42:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:49,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849151780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:49,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:49,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:42:49,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906243129] [2021-06-05 23:42:49,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:42:49,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:49,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:42:49,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:42:49,162 INFO L87 Difference]: Start difference. First operand 6836 states and 23359 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:54,017 INFO L93 Difference]: Finished difference Result 10075 states and 32916 transitions. [2021-06-05 23:42:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:42:54,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:54,032 INFO L225 Difference]: With dead ends: 10075 [2021-06-05 23:42:54,032 INFO L226 Difference]: Without dead ends: 10049 [2021-06-05 23:42:54,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3614 ImplicationChecksByTransitivity, 4260.9ms TimeCoverageRelationStatistics Valid=1570, Invalid=8330, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 23:42:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10049 states. [2021-06-05 23:42:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10049 to 6864. [2021-06-05 23:42:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 6863 states have (on average 3.420370100539123) internal successors, (23474), 6863 states have internal predecessors, (23474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 23474 transitions. [2021-06-05 23:42:54,152 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 23474 transitions. Word has length 30 [2021-06-05 23:42:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:54,152 INFO L482 AbstractCegarLoop]: Abstraction has 6864 states and 23474 transitions. [2021-06-05 23:42:54,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 23474 transitions. [2021-06-05 23:42:54,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:54,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:54,161 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:54,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:54,362 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:54,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:54,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2098603023, now seen corresponding path program 44 times [2021-06-05 23:42:54,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:54,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24685480] [2021-06-05 23:42:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:54,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:54,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24685480] [2021-06-05 23:42:54,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24685480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:54,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598785274] [2021-06-05 23:42:54,670 INFO L93 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 [2021-06-05 23:42:54,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:54,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:54,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:42:54,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:55,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:55,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:55,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:55,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:55,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:42:55,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:55,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:55,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:55,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:3 [2021-06-05 23:42:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:55,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598785274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:55,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:55,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 23:42:55,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955075828] [2021-06-05 23:42:55,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:42:55,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:55,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:42:55,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:42:55,050 INFO L87 Difference]: Start difference. First operand 6864 states and 23474 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:57,303 INFO L93 Difference]: Finished difference Result 11521 states and 37730 transitions. [2021-06-05 23:42:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:42:57,303 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:42:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:57,321 INFO L225 Difference]: With dead ends: 11521 [2021-06-05 23:42:57,321 INFO L226 Difference]: Without dead ends: 11500 [2021-06-05 23:42:57,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1730.7ms TimeCoverageRelationStatistics Valid=665, Invalid=4447, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:42:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11500 states. [2021-06-05 23:42:57,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11500 to 6890. [2021-06-05 23:42:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6890 states, 6889 states have (on average 3.4235738133255915) internal successors, (23585), 6889 states have internal predecessors, (23585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6890 states to 6890 states and 23585 transitions. [2021-06-05 23:42:57,458 INFO L78 Accepts]: Start accepts. Automaton has 6890 states and 23585 transitions. Word has length 30 [2021-06-05 23:42:57,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:57,458 INFO L482 AbstractCegarLoop]: Abstraction has 6890 states and 23585 transitions. [2021-06-05 23:42:57,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:57,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6890 states and 23585 transitions. [2021-06-05 23:42:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:42:57,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:57,467 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:57,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:57,667 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:57,668 INFO L82 PathProgramCache]: Analyzing trace with hash 2044173309, now seen corresponding path program 45 times [2021-06-05 23:42:57,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:57,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380960645] [2021-06-05 23:42:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:58,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:58,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380960645] [2021-06-05 23:42:58,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380960645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:58,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786919564] [2021-06-05 23:42:58,011 INFO L93 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 [2021-06-05 23:42:58,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:42:58,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:58,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:42:58,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:58,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:58,234 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 23:42:58,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 68 [2021-06-05 23:42:58,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:58,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:58,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:58,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:15 [2021-06-05 23:42:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:58,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786919564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:58,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:58,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-05 23:42:58,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45230252] [2021-06-05 23:42:58,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:42:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:42:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:42:58,289 INFO L87 Difference]: Start difference. First operand 6890 states and 23585 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:59,597 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 23:42:59,863 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 23:43:03,253 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 23:43:03,503 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 23:43:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:03,961 INFO L93 Difference]: Finished difference Result 11048 states and 36381 transitions. [2021-06-05 23:43:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 23:43:03,962 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:03,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:03,980 INFO L225 Difference]: With dead ends: 11048 [2021-06-05 23:43:03,980 INFO L226 Difference]: Without dead ends: 10971 [2021-06-05 23:43:03,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 4476.0ms TimeCoverageRelationStatistics Valid=1535, Invalid=9385, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 23:43:03,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2021-06-05 23:43:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 7036. [2021-06-05 23:43:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 7035 states have (on average 3.4169154228855723) internal successors, (24038), 7035 states have internal predecessors, (24038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 24038 transitions. [2021-06-05 23:43:04,115 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 24038 transitions. Word has length 30 [2021-06-05 23:43:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:04,115 INFO L482 AbstractCegarLoop]: Abstraction has 7036 states and 24038 transitions. [2021-06-05 23:43:04,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 24038 transitions. [2021-06-05 23:43:04,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:04,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:04,164 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:04,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 23:43:04,365 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:04,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:04,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2029573961, now seen corresponding path program 46 times [2021-06-05 23:43:04,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:04,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711855697] [2021-06-05 23:43:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:04,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:04,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711855697] [2021-06-05 23:43:04,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711855697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:04,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842304251] [2021-06-05 23:43:04,782 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:43:04,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:43:04,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:04,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:43:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:05,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:05,076 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 23:43:05,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 58 [2021-06-05 23:43:05,078 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:05,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:05,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:05,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:13 [2021-06-05 23:43:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:05,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842304251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:05,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:05,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 23:43:05,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769194178] [2021-06-05 23:43:05,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:43:05,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:05,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:43:05,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:43:05,140 INFO L87 Difference]: Start difference. First operand 7036 states and 24038 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:07,406 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 23:43:08,241 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-05 23:43:08,464 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-05 23:43:08,989 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-06-05 23:43:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:10,269 INFO L93 Difference]: Finished difference Result 9538 states and 31634 transitions. [2021-06-05 23:43:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 23:43:10,270 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:10,285 INFO L225 Difference]: With dead ends: 9538 [2021-06-05 23:43:10,285 INFO L226 Difference]: Without dead ends: 9523 [2021-06-05 23:43:10,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 4512.9ms TimeCoverageRelationStatistics Valid=981, Invalid=6675, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 23:43:10,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-06-05 23:43:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 7037. [2021-06-05 23:43:10,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7037 states, 7036 states have (on average 3.417140420693576) internal successors, (24043), 7036 states have internal predecessors, (24043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 24043 transitions. [2021-06-05 23:43:10,402 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 24043 transitions. Word has length 30 [2021-06-05 23:43:10,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:10,402 INFO L482 AbstractCegarLoop]: Abstraction has 7037 states and 24043 transitions. [2021-06-05 23:43:10,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 24043 transitions. [2021-06-05 23:43:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:10,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:10,411 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:10,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 23:43:10,612 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:10,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:10,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1541053273, now seen corresponding path program 47 times [2021-06-05 23:43:10,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:10,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845763306] [2021-06-05 23:43:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:10,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:10,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845763306] [2021-06-05 23:43:10,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845763306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:10,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875906856] [2021-06-05 23:43:10,888 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 [2021-06-05 23:43:10,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:43:10,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:10,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:43:10,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:11,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:11,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:11,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:11,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 23:43:11,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:43:11,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:11,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:11,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-06-05 23:43:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:11,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875906856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:11,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:11,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-05 23:43:11,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925724981] [2021-06-05 23:43:11,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:43:11,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:11,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:43:11,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:43:11,200 INFO L87 Difference]: Start difference. First operand 7037 states and 24043 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:16,814 INFO L93 Difference]: Finished difference Result 12819 states and 41403 transitions. [2021-06-05 23:43:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 23:43:16,814 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:16,836 INFO L225 Difference]: With dead ends: 12819 [2021-06-05 23:43:16,836 INFO L226 Difference]: Without dead ends: 12789 [2021-06-05 23:43:16,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4395 ImplicationChecksByTransitivity, 4639.9ms TimeCoverageRelationStatistics Valid=1803, Invalid=10853, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 23:43:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12789 states. [2021-06-05 23:43:16,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12789 to 7083. [2021-06-05 23:43:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 3.415419373058458) internal successors, (24188), 7082 states have internal predecessors, (24188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 24188 transitions. [2021-06-05 23:43:16,981 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 24188 transitions. Word has length 30 [2021-06-05 23:43:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:16,981 INFO L482 AbstractCegarLoop]: Abstraction has 7083 states and 24188 transitions. [2021-06-05 23:43:16,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 24188 transitions. [2021-06-05 23:43:16,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:16,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:16,989 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:17,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 23:43:17,190 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:17,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:17,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1282297551, now seen corresponding path program 48 times [2021-06-05 23:43:17,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:17,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312636493] [2021-06-05 23:43:17,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:17,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:17,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312636493] [2021-06-05 23:43:17,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312636493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:17,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058915489] [2021-06-05 23:43:17,628 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 [2021-06-05 23:43:17,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:43:17,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:17,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:43:17,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:17,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:17,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:17,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 23:43:17,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:43:17,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:17,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:17,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-06-05 23:43:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:17,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058915489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:17,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:17,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:43:17,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394701377] [2021-06-05 23:43:17,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:43:17,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:17,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:43:17,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:43:17,983 INFO L87 Difference]: Start difference. First operand 7083 states and 24188 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:20,975 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-05 23:43:21,178 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-05 23:43:21,665 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-06-05 23:43:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:22,898 INFO L93 Difference]: Finished difference Result 9072 states and 30203 transitions. [2021-06-05 23:43:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:43:22,899 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:22,912 INFO L225 Difference]: With dead ends: 9072 [2021-06-05 23:43:22,912 INFO L226 Difference]: Without dead ends: 9057 [2021-06-05 23:43:22,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4316.3ms TimeCoverageRelationStatistics Valid=889, Invalid=6767, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 23:43:22,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9057 states. [2021-06-05 23:43:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9057 to 7074. [2021-06-05 23:43:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7074 states, 7073 states have (on average 3.4155238229888307) internal successors, (24158), 7073 states have internal predecessors, (24158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7074 states to 7074 states and 24158 transitions. [2021-06-05 23:43:23,021 INFO L78 Accepts]: Start accepts. Automaton has 7074 states and 24158 transitions. Word has length 30 [2021-06-05 23:43:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:23,021 INFO L482 AbstractCegarLoop]: Abstraction has 7074 states and 24158 transitions. [2021-06-05 23:43:23,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 7074 states and 24158 transitions. [2021-06-05 23:43:23,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:23,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:23,030 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:23,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:23,230 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:23,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:23,231 INFO L82 PathProgramCache]: Analyzing trace with hash 499662597, now seen corresponding path program 49 times [2021-06-05 23:43:23,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:23,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709131944] [2021-06-05 23:43:23,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:23,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:23,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709131944] [2021-06-05 23:43:23,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709131944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:23,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312036819] [2021-06-05 23:43:23,598 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 [2021-06-05 23:43:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:23,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:43:23,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:23,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:23,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:23,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:23,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:23,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:43:23,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:23,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:23,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:23,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:43:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:23,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312036819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:23,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:23,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:43:23,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085541535] [2021-06-05 23:43:23,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:43:23,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:23,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:43:23,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:43:23,804 INFO L87 Difference]: Start difference. First operand 7074 states and 24158 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:26,355 INFO L93 Difference]: Finished difference Result 8621 states and 28929 transitions. [2021-06-05 23:43:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:43:26,356 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:26,370 INFO L225 Difference]: With dead ends: 8621 [2021-06-05 23:43:26,370 INFO L226 Difference]: Without dead ends: 8595 [2021-06-05 23:43:26,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 2118.6ms TimeCoverageRelationStatistics Valid=502, Invalid=3404, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:43:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8595 states. [2021-06-05 23:43:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8595 to 7060. [2021-06-05 23:43:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7060 states, 7059 states have (on average 3.417339566510837) internal successors, (24123), 7059 states have internal predecessors, (24123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 24123 transitions. [2021-06-05 23:43:26,479 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 24123 transitions. Word has length 30 [2021-06-05 23:43:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:26,479 INFO L482 AbstractCegarLoop]: Abstraction has 7060 states and 24123 transitions. [2021-06-05 23:43:26,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 24123 transitions. [2021-06-05 23:43:26,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:26,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:26,488 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:26,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:26,688 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1728681022, now seen corresponding path program 68 times [2021-06-05 23:43:26,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:26,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045492270] [2021-06-05 23:43:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:26,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:26,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045492270] [2021-06-05 23:43:26,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045492270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:26,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210003041] [2021-06-05 23:43:26,835 INFO L93 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 [2021-06-05 23:43:26,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:43:26,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:26,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:43:26,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:27,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:27,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:27,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:43:27,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:27,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:27,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:27,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:43:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:27,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210003041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:27,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:27,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:43:27,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205168770] [2021-06-05 23:43:27,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:43:27,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:27,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:43:27,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:43:27,099 INFO L87 Difference]: Start difference. First operand 7060 states and 24123 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:27,974 INFO L93 Difference]: Finished difference Result 8380 states and 27726 transitions. [2021-06-05 23:43:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:43:27,974 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:27,988 INFO L225 Difference]: With dead ends: 8380 [2021-06-05 23:43:27,988 INFO L226 Difference]: Without dead ends: 8365 [2021-06-05 23:43:27,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 689.2ms TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:43:27,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2021-06-05 23:43:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 7072. [2021-06-05 23:43:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7072 states, 7071 states have (on average 3.4171970018384954) internal successors, (24163), 7071 states have internal predecessors, (24163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7072 states to 7072 states and 24163 transitions. [2021-06-05 23:43:28,115 INFO L78 Accepts]: Start accepts. Automaton has 7072 states and 24163 transitions. Word has length 30 [2021-06-05 23:43:28,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:28,115 INFO L482 AbstractCegarLoop]: Abstraction has 7072 states and 24163 transitions. [2021-06-05 23:43:28,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7072 states and 24163 transitions. [2021-06-05 23:43:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:28,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:28,125 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:28,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 23:43:28,326 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:28,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:28,326 INFO L82 PathProgramCache]: Analyzing trace with hash -691888966, now seen corresponding path program 69 times [2021-06-05 23:43:28,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:28,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225171263] [2021-06-05 23:43:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:28,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:28,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225171263] [2021-06-05 23:43:28,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225171263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:28,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045736458] [2021-06-05 23:43:28,482 INFO L93 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 [2021-06-05 23:43:28,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:43:28,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:43:28,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:28,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:28,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:28,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:43:28,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:28,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:28,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:28,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-05 23:43:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:28,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045736458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:28,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:28,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:43:28,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386493970] [2021-06-05 23:43:28,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:43:28,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:28,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:43:28,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:43:28,852 INFO L87 Difference]: Start difference. First operand 7072 states and 24163 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:29,912 INFO L93 Difference]: Finished difference Result 8309 states and 27513 transitions. [2021-06-05 23:43:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:43:29,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:29,928 INFO L225 Difference]: With dead ends: 8309 [2021-06-05 23:43:29,928 INFO L226 Difference]: Without dead ends: 8279 [2021-06-05 23:43:29,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 798.8ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:43:29,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8279 states. [2021-06-05 23:43:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8279 to 7064. [2021-06-05 23:43:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7064 states, 7063 states have (on average 3.4176695455189012) internal successors, (24139), 7063 states have internal predecessors, (24139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7064 states to 7064 states and 24139 transitions. [2021-06-05 23:43:30,051 INFO L78 Accepts]: Start accepts. Automaton has 7064 states and 24139 transitions. Word has length 30 [2021-06-05 23:43:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:30,051 INFO L482 AbstractCegarLoop]: Abstraction has 7064 states and 24139 transitions. [2021-06-05 23:43:30,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:30,051 INFO L276 IsEmpty]: Start isEmpty. Operand 7064 states and 24139 transitions. [2021-06-05 23:43:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:30,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:30,060 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:30,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 23:43:30,261 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:30,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:30,261 INFO L82 PathProgramCache]: Analyzing trace with hash 682939496, now seen corresponding path program 70 times [2021-06-05 23:43:30,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:30,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960957737] [2021-06-05 23:43:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:30,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:30,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960957737] [2021-06-05 23:43:30,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960957737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:30,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108784611] [2021-06-05 23:43:30,457 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:43:30,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:43:30,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:30,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:43:30,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:30,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:30,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:30,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:43:30,667 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:30,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:30,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:30,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:43:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:30,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108784611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:30,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:30,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:43:30,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366078469] [2021-06-05 23:43:30,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:43:30,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:30,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:43:30,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:43:30,721 INFO L87 Difference]: Start difference. First operand 7064 states and 24139 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:33,118 INFO L93 Difference]: Finished difference Result 13253 states and 43828 transitions. [2021-06-05 23:43:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:43:33,118 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:33,140 INFO L225 Difference]: With dead ends: 13253 [2021-06-05 23:43:33,140 INFO L226 Difference]: Without dead ends: 13223 [2021-06-05 23:43:33,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1752.7ms TimeCoverageRelationStatistics Valid=663, Invalid=3759, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:43:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13223 states. [2021-06-05 23:43:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13223 to 7065. [2021-06-05 23:43:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 7064 states have (on average 3.4173272933182335) internal successors, (24140), 7064 states have internal predecessors, (24140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:33,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 24140 transitions. [2021-06-05 23:43:33,332 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 24140 transitions. Word has length 30 [2021-06-05 23:43:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:33,332 INFO L482 AbstractCegarLoop]: Abstraction has 7065 states and 24140 transitions. [2021-06-05 23:43:33,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 24140 transitions. [2021-06-05 23:43:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:33,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:33,341 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:33,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 23:43:33,542 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:33,542 INFO L82 PathProgramCache]: Analyzing trace with hash -8608016, now seen corresponding path program 71 times [2021-06-05 23:43:33,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:33,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495484882] [2021-06-05 23:43:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:33,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:33,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495484882] [2021-06-05 23:43:33,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495484882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:33,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778933400] [2021-06-05 23:43:33,692 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 [2021-06-05 23:43:33,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:43:33,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:33,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:43:33,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:33,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:33,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:43:33,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:33,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:33,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:33,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:43:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:33,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778933400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:33,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:33,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:43:33,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895800922] [2021-06-05 23:43:33,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:43:33,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:33,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:43:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:43:33,959 INFO L87 Difference]: Start difference. First operand 7065 states and 24140 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:34,758 INFO L93 Difference]: Finished difference Result 8952 states and 29987 transitions. [2021-06-05 23:43:34,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:43:34,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:34,773 INFO L225 Difference]: With dead ends: 8952 [2021-06-05 23:43:34,774 INFO L226 Difference]: Without dead ends: 8937 [2021-06-05 23:43:34,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 617.6ms TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:43:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8937 states. [2021-06-05 23:43:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8937 to 7070. [2021-06-05 23:43:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7070 states, 7069 states have (on average 3.417032112038478) internal successors, (24155), 7069 states have internal predecessors, (24155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7070 states to 7070 states and 24155 transitions. [2021-06-05 23:43:34,891 INFO L78 Accepts]: Start accepts. Automaton has 7070 states and 24155 transitions. Word has length 30 [2021-06-05 23:43:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:34,891 INFO L482 AbstractCegarLoop]: Abstraction has 7070 states and 24155 transitions. [2021-06-05 23:43:34,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 7070 states and 24155 transitions. [2021-06-05 23:43:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:34,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:34,901 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:35,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 23:43:35,101 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:35,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1865789292, now seen corresponding path program 72 times [2021-06-05 23:43:35,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:35,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260954131] [2021-06-05 23:43:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:35,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:35,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260954131] [2021-06-05 23:43:35,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260954131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:35,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35260819] [2021-06-05 23:43:35,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:43:35,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:43:35,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:35,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:43:35,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:35,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:35,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:35,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:35,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 23:43:35,453 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:35,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:35,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:35,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 23:43:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:35,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35260819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:35,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:35,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:43:35,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81162725] [2021-06-05 23:43:35,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:43:35,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:35,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:43:35,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:43:35,521 INFO L87 Difference]: Start difference. First operand 7070 states and 24155 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:37,271 INFO L93 Difference]: Finished difference Result 9351 states and 31228 transitions. [2021-06-05 23:43:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:43:37,271 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:37,287 INFO L225 Difference]: With dead ends: 9351 [2021-06-05 23:43:37,287 INFO L226 Difference]: Without dead ends: 9316 [2021-06-05 23:43:37,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1197.3ms TimeCoverageRelationStatistics Valid=303, Invalid=2349, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:43:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-06-05 23:43:37,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 7069. [2021-06-05 23:43:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7069 states, 7068 states have (on average 3.4161007357102435) internal successors, (24145), 7068 states have internal predecessors, (24145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7069 states to 7069 states and 24145 transitions. [2021-06-05 23:43:37,421 INFO L78 Accepts]: Start accepts. Automaton has 7069 states and 24145 transitions. Word has length 30 [2021-06-05 23:43:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:37,421 INFO L482 AbstractCegarLoop]: Abstraction has 7069 states and 24145 transitions. [2021-06-05 23:43:37,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:37,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7069 states and 24145 transitions. [2021-06-05 23:43:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:37,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:37,431 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:37,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 23:43:37,631 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:37,631 INFO L82 PathProgramCache]: Analyzing trace with hash -43636904, now seen corresponding path program 73 times [2021-06-05 23:43:37,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:37,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372300401] [2021-06-05 23:43:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:37,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:37,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372300401] [2021-06-05 23:43:37,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372300401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:37,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833645523] [2021-06-05 23:43:37,782 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 [2021-06-05 23:43:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:37,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:43:37,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:38,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:38,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:38,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:43:38,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:38,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:38,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:38,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:43:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:38,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833645523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:38,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:38,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:43:38,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144653480] [2021-06-05 23:43:38,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:43:38,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:38,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:43:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:43:38,048 INFO L87 Difference]: Start difference. First operand 7069 states and 24145 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:39,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:39,232 INFO L93 Difference]: Finished difference Result 9314 states and 31182 transitions. [2021-06-05 23:43:39,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:43:39,232 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:39,247 INFO L225 Difference]: With dead ends: 9314 [2021-06-05 23:43:39,247 INFO L226 Difference]: Without dead ends: 9299 [2021-06-05 23:43:39,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 981.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:43:39,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9299 states. [2021-06-05 23:43:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9299 to 7071. [2021-06-05 23:43:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 3.4164073550212164) internal successors, (24154), 7070 states have internal predecessors, (24154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 24154 transitions. [2021-06-05 23:43:39,375 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 24154 transitions. Word has length 30 [2021-06-05 23:43:39,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:39,375 INFO L482 AbstractCegarLoop]: Abstraction has 7071 states and 24154 transitions. [2021-06-05 23:43:39,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:39,375 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 24154 transitions. [2021-06-05 23:43:39,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:39,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:39,384 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:39,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:39,584 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:39,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:39,585 INFO L82 PathProgramCache]: Analyzing trace with hash 154706472, now seen corresponding path program 74 times [2021-06-05 23:43:39,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:39,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147462645] [2021-06-05 23:43:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:39,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:39,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147462645] [2021-06-05 23:43:39,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147462645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:39,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026252514] [2021-06-05 23:43:39,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:43:39,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:43:39,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:39,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:43:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:39,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:39,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:39,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:39,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 23:43:39,965 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:39,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:39,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:39,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:23 [2021-06-05 23:43:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:40,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026252514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:40,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:40,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:43:40,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014974504] [2021-06-05 23:43:40,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:43:40,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:40,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:43:40,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:43:40,020 INFO L87 Difference]: Start difference. First operand 7071 states and 24154 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:41,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:41,673 INFO L93 Difference]: Finished difference Result 9796 states and 32685 transitions. [2021-06-05 23:43:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:43:41,673 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:41,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:41,688 INFO L225 Difference]: With dead ends: 9796 [2021-06-05 23:43:41,688 INFO L226 Difference]: Without dead ends: 9781 [2021-06-05 23:43:41,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1267.7ms TimeCoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:43:41,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2021-06-05 23:43:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 7069. [2021-06-05 23:43:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7069 states, 7068 states have (on average 3.4161007357102435) internal successors, (24145), 7068 states have internal predecessors, (24145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7069 states to 7069 states and 24145 transitions. [2021-06-05 23:43:41,813 INFO L78 Accepts]: Start accepts. Automaton has 7069 states and 24145 transitions. Word has length 30 [2021-06-05 23:43:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:41,813 INFO L482 AbstractCegarLoop]: Abstraction has 7069 states and 24145 transitions. [2021-06-05 23:43:41,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 7069 states and 24145 transitions. [2021-06-05 23:43:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:41,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:41,822 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:42,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 23:43:42,022 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:42,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1280772920, now seen corresponding path program 75 times [2021-06-05 23:43:42,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:42,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980659361] [2021-06-05 23:43:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:42,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:42,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980659361] [2021-06-05 23:43:42,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980659361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:42,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049118946] [2021-06-05 23:43:42,181 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 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 [2021-06-05 23:43:42,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:43:42,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:42,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:43:42,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:42,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:42,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:42,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:43:42,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:42,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:42,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:42,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-05 23:43:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:42,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049118946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:42,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:42,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:43:42,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544041619] [2021-06-05 23:43:42,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:43:42,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:42,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:43:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:43:42,468 INFO L87 Difference]: Start difference. First operand 7069 states and 24145 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:44,197 INFO L93 Difference]: Finished difference Result 11687 states and 38279 transitions. [2021-06-05 23:43:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:43:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:44,214 INFO L225 Difference]: With dead ends: 11687 [2021-06-05 23:43:44,214 INFO L226 Difference]: Without dead ends: 11666 [2021-06-05 23:43:44,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 1073.1ms TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:43:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11666 states. [2021-06-05 23:43:44,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11666 to 7054. [2021-06-05 23:43:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7054 states, 7053 states have (on average 3.4162767616617042) internal successors, (24095), 7053 states have internal predecessors, (24095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7054 states to 7054 states and 24095 transitions. [2021-06-05 23:43:44,341 INFO L78 Accepts]: Start accepts. Automaton has 7054 states and 24095 transitions. Word has length 30 [2021-06-05 23:43:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:44,341 INFO L482 AbstractCegarLoop]: Abstraction has 7054 states and 24095 transitions. [2021-06-05 23:43:44,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:44,341 INFO L276 IsEmpty]: Start isEmpty. Operand 7054 states and 24095 transitions. [2021-06-05 23:43:44,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:44,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:44,350 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:44,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 23:43:44,550 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash -575656810, now seen corresponding path program 76 times [2021-06-05 23:43:44,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:44,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141429272] [2021-06-05 23:43:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:44,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:44,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141429272] [2021-06-05 23:43:44,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141429272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:44,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629298066] [2021-06-05 23:43:44,715 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:43:44,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:43:44,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:44,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:43:44,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:45,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:45,052 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 23:43:45,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 56 [2021-06-05 23:43:45,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:45,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:45,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:45,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:3 [2021-06-05 23:43:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:45,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629298066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:45,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:45,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:43:45,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294023833] [2021-06-05 23:43:45,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:43:45,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:45,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:43:45,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:43:45,092 INFO L87 Difference]: Start difference. First operand 7054 states and 24095 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:46,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:46,655 INFO L93 Difference]: Finished difference Result 10880 states and 36101 transitions. [2021-06-05 23:43:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:43:46,655 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:46,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:46,672 INFO L225 Difference]: With dead ends: 10880 [2021-06-05 23:43:46,672 INFO L226 Difference]: Without dead ends: 10859 [2021-06-05 23:43:46,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 973.8ms TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:43:46,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2021-06-05 23:43:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 7061. [2021-06-05 23:43:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7061 states, 7060 states have (on average 3.41685552407932) internal successors, (24123), 7060 states have internal predecessors, (24123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7061 states to 7061 states and 24123 transitions. [2021-06-05 23:43:46,791 INFO L78 Accepts]: Start accepts. Automaton has 7061 states and 24123 transitions. Word has length 30 [2021-06-05 23:43:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:46,791 INFO L482 AbstractCegarLoop]: Abstraction has 7061 states and 24123 transitions. [2021-06-05 23:43:46,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 7061 states and 24123 transitions. [2021-06-05 23:43:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:46,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:46,800 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:47,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 23:43:47,000 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1197451026, now seen corresponding path program 77 times [2021-06-05 23:43:47,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:47,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168954291] [2021-06-05 23:43:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:47,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:47,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168954291] [2021-06-05 23:43:47,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168954291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:47,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974055532] [2021-06-05 23:43:47,164 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 [2021-06-05 23:43:47,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:43:47,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:47,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:43:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:47,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:47,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:47,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:43:47,399 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:47,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:47,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:47,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:43:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:47,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974055532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:47,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:47,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 23:43:47,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991927772] [2021-06-05 23:43:47,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:43:47,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:47,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:43:47,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:43:47,453 INFO L87 Difference]: Start difference. First operand 7061 states and 24123 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:49,379 INFO L93 Difference]: Finished difference Result 11290 states and 37387 transitions. [2021-06-05 23:43:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:43:49,380 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:49,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:49,398 INFO L225 Difference]: With dead ends: 11290 [2021-06-05 23:43:49,398 INFO L226 Difference]: Without dead ends: 11254 [2021-06-05 23:43:49,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 1498.3ms TimeCoverageRelationStatistics Valid=553, Invalid=3353, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:43:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11254 states. [2021-06-05 23:43:49,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11254 to 7068. [2021-06-05 23:43:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 7067 states have (on average 3.4184236592613555) internal successors, (24158), 7067 states have internal predecessors, (24158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 24158 transitions. [2021-06-05 23:43:49,548 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 24158 transitions. Word has length 30 [2021-06-05 23:43:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:49,548 INFO L482 AbstractCegarLoop]: Abstraction has 7068 states and 24158 transitions. [2021-06-05 23:43:49,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 24158 transitions. [2021-06-05 23:43:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:49,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:49,558 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:49,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 23:43:49,759 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:49,759 INFO L82 PathProgramCache]: Analyzing trace with hash 479008484, now seen corresponding path program 78 times [2021-06-05 23:43:49,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:49,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049315319] [2021-06-05 23:43:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:49,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:49,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049315319] [2021-06-05 23:43:49,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049315319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:49,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117433338] [2021-06-05 23:43:49,926 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 [2021-06-05 23:43:49,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:43:49,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:49,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:43:49,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:50,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:50,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:50,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:43:50,136 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:50,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:50,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:50,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:43:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:50,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117433338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:50,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:50,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:43:50,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472216151] [2021-06-05 23:43:50,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:43:50,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:50,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:43:50,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:43:50,192 INFO L87 Difference]: Start difference. First operand 7068 states and 24158 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:51,747 INFO L93 Difference]: Finished difference Result 11632 states and 38612 transitions. [2021-06-05 23:43:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:43:51,747 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:51,766 INFO L225 Difference]: With dead ends: 11632 [2021-06-05 23:43:51,766 INFO L226 Difference]: Without dead ends: 11582 [2021-06-05 23:43:51,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1037.7ms TimeCoverageRelationStatistics Valid=360, Invalid=1992, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:43:51,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11582 states. [2021-06-05 23:43:51,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11582 to 7063. [2021-06-05 23:43:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7063 states, 7062 states have (on average 3.4170206740300197) internal successors, (24131), 7062 states have internal predecessors, (24131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7063 states to 7063 states and 24131 transitions. [2021-06-05 23:43:51,909 INFO L78 Accepts]: Start accepts. Automaton has 7063 states and 24131 transitions. Word has length 30 [2021-06-05 23:43:51,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:51,909 INFO L482 AbstractCegarLoop]: Abstraction has 7063 states and 24131 transitions. [2021-06-05 23:43:51,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:51,909 INFO L276 IsEmpty]: Start isEmpty. Operand 7063 states and 24131 transitions. [2021-06-05 23:43:51,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:51,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:51,918 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:52,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 23:43:52,118 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:52,119 INFO L82 PathProgramCache]: Analyzing trace with hash -327230800, now seen corresponding path program 79 times [2021-06-05 23:43:52,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:52,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949502008] [2021-06-05 23:43:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:52,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:52,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949502008] [2021-06-05 23:43:52,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949502008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:52,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184213414] [2021-06-05 23:43:52,309 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 [2021-06-05 23:43:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:43:52,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:52,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:52,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:52,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:43:52,520 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:52,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:52,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:52,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:43:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:52,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184213414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:52,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:52,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:43:52,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368564514] [2021-06-05 23:43:52,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:43:52,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:52,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:43:52,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:43:52,575 INFO L87 Difference]: Start difference. First operand 7063 states and 24131 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:53,720 INFO L93 Difference]: Finished difference Result 11229 states and 37406 transitions. [2021-06-05 23:43:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:43:53,720 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:53,738 INFO L225 Difference]: With dead ends: 11229 [2021-06-05 23:43:53,738 INFO L226 Difference]: Without dead ends: 11179 [2021-06-05 23:43:53,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 781.9ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:43:53,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2021-06-05 23:43:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 7078. [2021-06-05 23:43:53,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 7077 states have (on average 3.4183976261127595) internal successors, (24192), 7077 states have internal predecessors, (24192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 24192 transitions. [2021-06-05 23:43:53,867 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 24192 transitions. Word has length 30 [2021-06-05 23:43:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:53,867 INFO L482 AbstractCegarLoop]: Abstraction has 7078 states and 24192 transitions. [2021-06-05 23:43:53,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 24192 transitions. [2021-06-05 23:43:53,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:53,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:53,875 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:54,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:54,076 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:54,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1558548792, now seen corresponding path program 80 times [2021-06-05 23:43:54,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:54,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602004132] [2021-06-05 23:43:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:54,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:54,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602004132] [2021-06-05 23:43:54,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602004132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:54,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646092609] [2021-06-05 23:43:54,284 INFO L93 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 [2021-06-05 23:43:54,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:43:54,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:54,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:43:54,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:54,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:54,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:54,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:54,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 23:43:54,492 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:54,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:54,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:54,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:20 [2021-06-05 23:43:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:54,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646092609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:54,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:54,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:43:54,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424511711] [2021-06-05 23:43:54,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:43:54,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:54,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:43:54,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:43:54,567 INFO L87 Difference]: Start difference. First operand 7078 states and 24192 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:55,921 INFO L93 Difference]: Finished difference Result 10337 states and 34372 transitions. [2021-06-05 23:43:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:43:55,921 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:55,939 INFO L225 Difference]: With dead ends: 10337 [2021-06-05 23:43:55,939 INFO L226 Difference]: Without dead ends: 10256 [2021-06-05 23:43:55,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1006.9ms TimeCoverageRelationStatistics Valid=311, Invalid=1851, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:43:55,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10256 states. [2021-06-05 23:43:56,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10256 to 7079. [2021-06-05 23:43:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 7078 states have (on average 3.418338513704436) internal successors, (24195), 7078 states have internal predecessors, (24195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 24195 transitions. [2021-06-05 23:43:56,061 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 24195 transitions. Word has length 30 [2021-06-05 23:43:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:56,062 INFO L482 AbstractCegarLoop]: Abstraction has 7079 states and 24195 transitions. [2021-06-05 23:43:56,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:56,062 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 24195 transitions. [2021-06-05 23:43:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:56,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:56,071 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:56,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 23:43:56,271 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:56,271 INFO L82 PathProgramCache]: Analyzing trace with hash 211718524, now seen corresponding path program 81 times [2021-06-05 23:43:56,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:56,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507120030] [2021-06-05 23:43:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:56,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:56,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507120030] [2021-06-05 23:43:56,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507120030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:56,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393370030] [2021-06-05 23:43:56,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:43:56,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:43:56,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:56,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:43:56,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:56,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:56,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:56,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:43:56,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:43:56,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:56,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:56,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:50 [2021-06-05 23:43:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:56,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393370030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:56,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:56,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:43:56,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176900562] [2021-06-05 23:43:56,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:43:56,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:56,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:43:56,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:43:56,775 INFO L87 Difference]: Start difference. First operand 7079 states and 24195 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:57,515 INFO L93 Difference]: Finished difference Result 8987 states and 30270 transitions. [2021-06-05 23:43:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:43:57,516 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:57,530 INFO L225 Difference]: With dead ends: 8987 [2021-06-05 23:43:57,530 INFO L226 Difference]: Without dead ends: 8962 [2021-06-05 23:43:57,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 575.4ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:43:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-06-05 23:43:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 7079. [2021-06-05 23:43:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 7078 states have (on average 3.418338513704436) internal successors, (24195), 7078 states have internal predecessors, (24195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 24195 transitions. [2021-06-05 23:43:57,645 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 24195 transitions. Word has length 30 [2021-06-05 23:43:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:57,645 INFO L482 AbstractCegarLoop]: Abstraction has 7079 states and 24195 transitions. [2021-06-05 23:43:57,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 24195 transitions. [2021-06-05 23:43:57,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:57,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:57,655 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:57,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 23:43:57,855 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:57,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:57,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1547132172, now seen corresponding path program 82 times [2021-06-05 23:43:57,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:57,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321158675] [2021-06-05 23:43:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:58,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:58,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321158675] [2021-06-05 23:43:58,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321158675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:58,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483374368] [2021-06-05 23:43:58,032 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:43:58,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:43:58,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:58,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:43:58,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:58,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:58,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:58,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:43:58,304 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:58,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:58,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:58,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:43:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:58,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483374368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:58,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:58,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:43:58,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397372327] [2021-06-05 23:43:58,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:43:58,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:58,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:43:58,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:43:58,357 INFO L87 Difference]: Start difference. First operand 7079 states and 24195 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:59,415 INFO L93 Difference]: Finished difference Result 9428 states and 31713 transitions. [2021-06-05 23:43:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:43:59,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:43:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:59,430 INFO L225 Difference]: With dead ends: 9428 [2021-06-05 23:43:59,430 INFO L226 Difference]: Without dead ends: 9413 [2021-06-05 23:43:59,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 800.5ms TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:43:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9413 states. [2021-06-05 23:43:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9413 to 7076. [2021-06-05 23:43:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 3.417950530035336) internal successors, (24182), 7075 states have internal predecessors, (24182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 24182 transitions. [2021-06-05 23:43:59,553 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 24182 transitions. Word has length 30 [2021-06-05 23:43:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:59,553 INFO L482 AbstractCegarLoop]: Abstraction has 7076 states and 24182 transitions. [2021-06-05 23:43:59,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 24182 transitions. [2021-06-05 23:43:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:43:59,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:59,563 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:59,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable440 [2021-06-05 23:43:59,763 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:59,763 INFO L82 PathProgramCache]: Analyzing trace with hash 790201086, now seen corresponding path program 83 times [2021-06-05 23:43:59,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:59,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102562294] [2021-06-05 23:43:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:59,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:59,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102562294] [2021-06-05 23:43:59,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102562294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:59,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630935397] [2021-06-05 23:43:59,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:43:59,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:43:59,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:59,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:43:59,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:00,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:00,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:00,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:44:00,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:00,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:00,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:00,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:44:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:00,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630935397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:00,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:00,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:44:00,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407468174] [2021-06-05 23:44:00,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:00,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:00,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:00,243 INFO L87 Difference]: Start difference. First operand 7076 states and 24182 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:00,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:00,720 INFO L93 Difference]: Finished difference Result 8712 states and 29355 transitions. [2021-06-05 23:44:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:44:00,720 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:00,735 INFO L225 Difference]: With dead ends: 8712 [2021-06-05 23:44:00,735 INFO L226 Difference]: Without dead ends: 8691 [2021-06-05 23:44:00,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:44:00,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8691 states. [2021-06-05 23:44:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8691 to 7081. [2021-06-05 23:44:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7080 states have (on average 3.418502824858757) internal successors, (24203), 7080 states have internal predecessors, (24203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 24203 transitions. [2021-06-05 23:44:00,847 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 24203 transitions. Word has length 30 [2021-06-05 23:44:00,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:00,847 INFO L482 AbstractCegarLoop]: Abstraction has 7081 states and 24203 transitions. [2021-06-05 23:44:00,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:00,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 24203 transitions. [2021-06-05 23:44:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:00,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:00,857 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:01,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 23:44:01,057 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash 988544462, now seen corresponding path program 84 times [2021-06-05 23:44:01,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:01,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989361182] [2021-06-05 23:44:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:01,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:01,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989361182] [2021-06-05 23:44:01,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989361182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:01,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657322667] [2021-06-05 23:44:01,246 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 [2021-06-05 23:44:01,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:44:01,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:01,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:44:01,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:01,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:01,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:01,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:01,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 23:44:01,545 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:01,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:01,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:01,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:25 [2021-06-05 23:44:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:01,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657322667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:01,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:01,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-05 23:44:01,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591299657] [2021-06-05 23:44:01,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:44:01,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:01,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:44:01,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:44:01,625 INFO L87 Difference]: Start difference. First operand 7081 states and 24203 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:03,607 INFO L93 Difference]: Finished difference Result 9784 states and 32690 transitions. [2021-06-05 23:44:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:44:03,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:03,623 INFO L225 Difference]: With dead ends: 9784 [2021-06-05 23:44:03,623 INFO L226 Difference]: Without dead ends: 9744 [2021-06-05 23:44:03,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1307.0ms TimeCoverageRelationStatistics Valid=348, Invalid=2514, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:44:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9744 states. [2021-06-05 23:44:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9744 to 7077. [2021-06-05 23:44:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 3.4166195590729225) internal successors, (24176), 7076 states have internal predecessors, (24176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 24176 transitions. [2021-06-05 23:44:03,753 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 24176 transitions. Word has length 30 [2021-06-05 23:44:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:03,753 INFO L482 AbstractCegarLoop]: Abstraction has 7077 states and 24176 transitions. [2021-06-05 23:44:03,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 24176 transitions. [2021-06-05 23:44:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:03,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:03,763 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:03,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 23:44:03,963 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:03,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:03,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1508282850, now seen corresponding path program 85 times [2021-06-05 23:44:03,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:03,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827701062] [2021-06-05 23:44:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:04,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:04,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827701062] [2021-06-05 23:44:04,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827701062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:04,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133267086] [2021-06-05 23:44:04,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:44:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:04,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:04,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:04,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:04,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:04,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:44:04,364 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:04,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:04,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:04,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 23:44:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:04,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133267086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:04,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:04,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:44:04,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962136317] [2021-06-05 23:44:04,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:04,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:04,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:04,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:04,446 INFO L87 Difference]: Start difference. First operand 7077 states and 24176 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:04,948 INFO L93 Difference]: Finished difference Result 8973 states and 30216 transitions. [2021-06-05 23:44:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:44:04,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:04,998 INFO L225 Difference]: With dead ends: 8973 [2021-06-05 23:44:04,999 INFO L226 Difference]: Without dead ends: 8938 [2021-06-05 23:44:04,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 497.9ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states. [2021-06-05 23:44:05,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8938 to 7076. [2021-06-05 23:44:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 3.416678445229682) internal successors, (24173), 7075 states have internal predecessors, (24173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 24173 transitions. [2021-06-05 23:44:05,110 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 24173 transitions. Word has length 30 [2021-06-05 23:44:05,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:05,110 INFO L482 AbstractCegarLoop]: Abstraction has 7076 states and 24173 transitions. [2021-06-05 23:44:05,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 24173 transitions. [2021-06-05 23:44:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:05,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:05,120 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:05,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:05,320 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1182471836, now seen corresponding path program 86 times [2021-06-05 23:44:05,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:05,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120586507] [2021-06-05 23:44:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:05,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:05,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120586507] [2021-06-05 23:44:05,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120586507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:05,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973702674] [2021-06-05 23:44:05,491 INFO L93 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 [2021-06-05 23:44:05,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:05,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:05,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:44:05,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:05,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:05,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:44:05,716 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:05,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:44:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:05,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973702674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:05,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:05,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:44:05,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356815297] [2021-06-05 23:44:05,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:44:05,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:05,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:44:05,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:44:05,768 INFO L87 Difference]: Start difference. First operand 7076 states and 24173 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:08,480 INFO L93 Difference]: Finished difference Result 12654 states and 41623 transitions. [2021-06-05 23:44:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:44:08,480 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:08,501 INFO L225 Difference]: With dead ends: 12654 [2021-06-05 23:44:08,502 INFO L226 Difference]: Without dead ends: 12575 [2021-06-05 23:44:08,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 2016.3ms TimeCoverageRelationStatistics Valid=754, Invalid=4358, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:44:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-06-05 23:44:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 7133. [2021-06-05 23:44:08,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7133 states, 7132 states have (on average 3.415171060011217) internal successors, (24357), 7132 states have internal predecessors, (24357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7133 states to 7133 states and 24357 transitions. [2021-06-05 23:44:08,676 INFO L78 Accepts]: Start accepts. Automaton has 7133 states and 24357 transitions. Word has length 30 [2021-06-05 23:44:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:08,676 INFO L482 AbstractCegarLoop]: Abstraction has 7133 states and 24357 transitions. [2021-06-05 23:44:08,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 7133 states and 24357 transitions. [2021-06-05 23:44:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:08,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:08,685 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:08,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:08,885 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:08,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:08,886 INFO L82 PathProgramCache]: Analyzing trace with hash -668317764, now seen corresponding path program 87 times [2021-06-05 23:44:08,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:08,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134765483] [2021-06-05 23:44:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:09,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:09,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134765483] [2021-06-05 23:44:09,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134765483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:09,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018491932] [2021-06-05 23:44:09,032 INFO L93 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 [2021-06-05 23:44:09,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:44:09,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:09,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:44:09,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:09,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:09,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:09,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:44:09,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:09,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:09,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:09,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:65 [2021-06-05 23:44:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:09,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018491932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:09,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:09,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:44:09,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015066551] [2021-06-05 23:44:09,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:09,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:09,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:09,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:09,351 INFO L87 Difference]: Start difference. First operand 7133 states and 24357 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:10,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:10,824 INFO L93 Difference]: Finished difference Result 10504 states and 34841 transitions. [2021-06-05 23:44:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:44:10,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:10,841 INFO L225 Difference]: With dead ends: 10504 [2021-06-05 23:44:10,842 INFO L226 Difference]: Without dead ends: 10458 [2021-06-05 23:44:10,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1215.6ms TimeCoverageRelationStatistics Valid=430, Invalid=2540, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:44:10,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10458 states. [2021-06-05 23:44:10,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10458 to 7177. [2021-06-05 23:44:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 3.4158305462653287) internal successors, (24512), 7176 states have internal predecessors, (24512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 24512 transitions. [2021-06-05 23:44:10,973 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 24512 transitions. Word has length 30 [2021-06-05 23:44:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:10,973 INFO L482 AbstractCegarLoop]: Abstraction has 7177 states and 24512 transitions. [2021-06-05 23:44:10,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 24512 transitions. [2021-06-05 23:44:10,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:10,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:10,983 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:11,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:11,183 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:11,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:11,183 INFO L82 PathProgramCache]: Analyzing trace with hash -221047002, now seen corresponding path program 88 times [2021-06-05 23:44:11,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:11,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268079156] [2021-06-05 23:44:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:11,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:11,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268079156] [2021-06-05 23:44:11,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268079156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:11,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249915585] [2021-06-05 23:44:11,358 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:44:11,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:11,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:11,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:11,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:11,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:44:11,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:11,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:11,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:11,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:44:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:11,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249915585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:11,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:11,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:44:11,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772267164] [2021-06-05 23:44:11,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:11,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:11,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:11,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:11,668 INFO L87 Difference]: Start difference. First operand 7177 states and 24512 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:12,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:12,775 INFO L93 Difference]: Finished difference Result 8909 states and 29971 transitions. [2021-06-05 23:44:12,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:44:12,775 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:12,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:12,790 INFO L225 Difference]: With dead ends: 8909 [2021-06-05 23:44:12,790 INFO L226 Difference]: Without dead ends: 8888 [2021-06-05 23:44:12,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 662.9ms TimeCoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:44:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8888 states. [2021-06-05 23:44:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8888 to 7177. [2021-06-05 23:44:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 3.4158305462653287) internal successors, (24512), 7176 states have internal predecessors, (24512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 24512 transitions. [2021-06-05 23:44:12,909 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 24512 transitions. Word has length 30 [2021-06-05 23:44:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:12,909 INFO L482 AbstractCegarLoop]: Abstraction has 7177 states and 24512 transitions. [2021-06-05 23:44:12,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 24512 transitions. [2021-06-05 23:44:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:12,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:12,919 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:13,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 23:44:13,121 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash 43416822, now seen corresponding path program 89 times [2021-06-05 23:44:13,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:13,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738303835] [2021-06-05 23:44:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:13,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:13,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738303835] [2021-06-05 23:44:13,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738303835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:13,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246789526] [2021-06-05 23:44:13,344 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 [2021-06-05 23:44:13,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:44:13,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:13,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:44:13,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:13,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:13,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:13,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:44:13,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:13,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:13,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:13,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-06-05 23:44:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:13,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246789526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:13,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:13,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 23:44:13,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878440961] [2021-06-05 23:44:13,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:44:13,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:13,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:44:13,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:44:13,819 INFO L87 Difference]: Start difference. First operand 7177 states and 24512 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:16,190 INFO L93 Difference]: Finished difference Result 9613 states and 32165 transitions. [2021-06-05 23:44:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:44:16,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:16,206 INFO L225 Difference]: With dead ends: 9613 [2021-06-05 23:44:16,206 INFO L226 Difference]: Without dead ends: 9533 [2021-06-05 23:44:16,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1818.9ms TimeCoverageRelationStatistics Valid=343, Invalid=2107, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:44:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2021-06-05 23:44:16,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 7204. [2021-06-05 23:44:16,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7204 states, 7203 states have (on average 3.414549493266694) internal successors, (24595), 7203 states have internal predecessors, (24595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7204 states to 7204 states and 24595 transitions. [2021-06-05 23:44:16,321 INFO L78 Accepts]: Start accepts. Automaton has 7204 states and 24595 transitions. Word has length 30 [2021-06-05 23:44:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:16,321 INFO L482 AbstractCegarLoop]: Abstraction has 7204 states and 24595 transitions. [2021-06-05 23:44:16,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 7204 states and 24595 transitions. [2021-06-05 23:44:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:16,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:16,330 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:16,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 23:44:16,531 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash -572506508, now seen corresponding path program 90 times [2021-06-05 23:44:16,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:16,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455949108] [2021-06-05 23:44:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:16,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:16,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455949108] [2021-06-05 23:44:16,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455949108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:16,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920656880] [2021-06-05 23:44:16,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:44:16,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:44:16,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:16,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:17,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:17,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:17,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 23:44:17,024 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:17,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:17,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:17,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 23:44:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:17,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920656880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:17,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:17,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:44:17,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167952310] [2021-06-05 23:44:17,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:44:17,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:17,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:44:17,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:44:17,107 INFO L87 Difference]: Start difference. First operand 7204 states and 24595 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:19,627 INFO L93 Difference]: Finished difference Result 10561 states and 34976 transitions. [2021-06-05 23:44:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:44:19,627 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:19,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:19,644 INFO L225 Difference]: With dead ends: 10561 [2021-06-05 23:44:19,644 INFO L226 Difference]: Without dead ends: 10514 [2021-06-05 23:44:19,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1749.3ms TimeCoverageRelationStatistics Valid=430, Invalid=2992, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:44:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10514 states. [2021-06-05 23:44:19,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10514 to 7197. [2021-06-05 23:44:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 7196 states have (on average 3.415230683713174) internal successors, (24576), 7196 states have internal predecessors, (24576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 24576 transitions. [2021-06-05 23:44:19,809 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 24576 transitions. Word has length 30 [2021-06-05 23:44:19,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:19,810 INFO L482 AbstractCegarLoop]: Abstraction has 7197 states and 24576 transitions. [2021-06-05 23:44:19,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 24576 transitions. [2021-06-05 23:44:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:19,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:19,820 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:20,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 23:44:20,020 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:20,021 INFO L82 PathProgramCache]: Analyzing trace with hash -124071064, now seen corresponding path program 91 times [2021-06-05 23:44:20,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:20,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621204195] [2021-06-05 23:44:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:20,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:20,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621204195] [2021-06-05 23:44:20,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621204195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:20,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603496670] [2021-06-05 23:44:20,340 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 [2021-06-05 23:44:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:20,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:44:20,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:20,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:20,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:20,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:44:20,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:20,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:20,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:20,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:44:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:20,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603496670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:20,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:20,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:44:20,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641976180] [2021-06-05 23:44:20,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:44:20,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:20,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:44:20,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:44:20,600 INFO L87 Difference]: Start difference. First operand 7197 states and 24576 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:21,792 INFO L93 Difference]: Finished difference Result 8814 states and 29558 transitions. [2021-06-05 23:44:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:44:21,792 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:21,806 INFO L225 Difference]: With dead ends: 8814 [2021-06-05 23:44:21,807 INFO L226 Difference]: Without dead ends: 8788 [2021-06-05 23:44:21,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 977.8ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:44:21,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8788 states. [2021-06-05 23:44:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8788 to 7205. [2021-06-05 23:44:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7205 states, 7204 states have (on average 3.4144919489172683) internal successors, (24598), 7204 states have internal predecessors, (24598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7205 states to 7205 states and 24598 transitions. [2021-06-05 23:44:21,923 INFO L78 Accepts]: Start accepts. Automaton has 7205 states and 24598 transitions. Word has length 30 [2021-06-05 23:44:21,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:21,923 INFO L482 AbstractCegarLoop]: Abstraction has 7205 states and 24598 transitions. [2021-06-05 23:44:21,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 7205 states and 24598 transitions. [2021-06-05 23:44:21,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:21,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:21,932 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:22,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:22,133 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:22,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:22,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1414795236, now seen corresponding path program 92 times [2021-06-05 23:44:22,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:22,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209091476] [2021-06-05 23:44:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:22,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:22,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209091476] [2021-06-05 23:44:22,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209091476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:22,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217081899] [2021-06-05 23:44:22,328 INFO L93 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 [2021-06-05 23:44:22,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:22,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:22,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:44:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:22,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:22,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:22,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:44:22,547 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:22,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:22,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:22,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:44:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:22,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217081899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:22,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:22,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:44:22,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141792134] [2021-06-05 23:44:22,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:44:22,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:22,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:44:22,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:44:22,598 INFO L87 Difference]: Start difference. First operand 7205 states and 24598 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:25,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:25,856 INFO L93 Difference]: Finished difference Result 12224 states and 40164 transitions. [2021-06-05 23:44:25,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 23:44:25,857 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:25,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:25,876 INFO L225 Difference]: With dead ends: 12224 [2021-06-05 23:44:25,876 INFO L226 Difference]: Without dead ends: 12147 [2021-06-05 23:44:25,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 2503.5ms TimeCoverageRelationStatistics Valid=1026, Invalid=5946, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:44:25,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12147 states. [2021-06-05 23:44:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12147 to 7309. [2021-06-05 23:44:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7309 states, 7308 states have (on average 3.4143404488232076) internal successors, (24952), 7308 states have internal predecessors, (24952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7309 states to 7309 states and 24952 transitions. [2021-06-05 23:44:26,035 INFO L78 Accepts]: Start accepts. Automaton has 7309 states and 24952 transitions. Word has length 30 [2021-06-05 23:44:26,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:26,035 INFO L482 AbstractCegarLoop]: Abstraction has 7309 states and 24952 transitions. [2021-06-05 23:44:26,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:26,035 INFO L276 IsEmpty]: Start isEmpty. Operand 7309 states and 24952 transitions. [2021-06-05 23:44:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:26,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:26,046 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:26,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:26,246 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:26,247 INFO L82 PathProgramCache]: Analyzing trace with hash 781180196, now seen corresponding path program 93 times [2021-06-05 23:44:26,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:26,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034533034] [2021-06-05 23:44:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:26,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:26,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034533034] [2021-06-05 23:44:26,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034533034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:26,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477185593] [2021-06-05 23:44:26,475 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 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 [2021-06-05 23:44:26,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:44:26,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:26,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:44:26,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:26,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:26,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:26,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:44:26,671 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:26,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:26,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:26,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:44:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:26,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477185593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:26,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:26,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:44:26,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494399145] [2021-06-05 23:44:26,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:26,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:26,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:26,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:26,729 INFO L87 Difference]: Start difference. First operand 7309 states and 24952 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:29,396 INFO L93 Difference]: Finished difference Result 12077 states and 39682 transitions. [2021-06-05 23:44:29,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 23:44:29,397 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:29,416 INFO L225 Difference]: With dead ends: 12077 [2021-06-05 23:44:29,416 INFO L226 Difference]: Without dead ends: 11990 [2021-06-05 23:44:29,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 2084.8ms TimeCoverageRelationStatistics Valid=929, Invalid=5077, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 23:44:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11990 states. [2021-06-05 23:44:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11990 to 7424. [2021-06-05 23:44:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7424 states, 7423 states have (on average 3.416004310925502) internal successors, (25357), 7423 states have internal predecessors, (25357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7424 states to 7424 states and 25357 transitions. [2021-06-05 23:44:29,578 INFO L78 Accepts]: Start accepts. Automaton has 7424 states and 25357 transitions. Word has length 30 [2021-06-05 23:44:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:29,578 INFO L482 AbstractCegarLoop]: Abstraction has 7424 states and 25357 transitions. [2021-06-05 23:44:29,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7424 states and 25357 transitions. [2021-06-05 23:44:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:29,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:29,588 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:29,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 23:44:29,788 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1722423664, now seen corresponding path program 94 times [2021-06-05 23:44:29,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:29,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640753948] [2021-06-05 23:44:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:30,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:30,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640753948] [2021-06-05 23:44:30,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640753948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:30,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599884635] [2021-06-05 23:44:30,061 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:44:30,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:30,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:30,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:44:30,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:30,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:30,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:30,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:44:30,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:30,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:30,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:30,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:44:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:30,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599884635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:30,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:30,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:44:30,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161293700] [2021-06-05 23:44:30,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:30,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:30,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:30,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:30,333 INFO L87 Difference]: Start difference. First operand 7424 states and 25357 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:32,759 INFO L93 Difference]: Finished difference Result 10675 states and 35520 transitions. [2021-06-05 23:44:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:44:32,759 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:32,775 INFO L225 Difference]: With dead ends: 10675 [2021-06-05 23:44:32,776 INFO L226 Difference]: Without dead ends: 10642 [2021-06-05 23:44:32,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 1938.9ms TimeCoverageRelationStatistics Valid=612, Invalid=3944, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:44:32,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10642 states. [2021-06-05 23:44:32,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10642 to 7435. [2021-06-05 23:44:32,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7435 states, 7434 states have (on average 3.4170029593758406) internal successors, (25402), 7434 states have internal predecessors, (25402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7435 states to 7435 states and 25402 transitions. [2021-06-05 23:44:32,899 INFO L78 Accepts]: Start accepts. Automaton has 7435 states and 25402 transitions. Word has length 30 [2021-06-05 23:44:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:32,899 INFO L482 AbstractCegarLoop]: Abstraction has 7435 states and 25402 transitions. [2021-06-05 23:44:32,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 7435 states and 25402 transitions. [2021-06-05 23:44:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:32,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:32,908 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:33,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 23:44:33,108 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:33,109 INFO L82 PathProgramCache]: Analyzing trace with hash 344478350, now seen corresponding path program 95 times [2021-06-05 23:44:33,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:33,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879927709] [2021-06-05 23:44:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:33,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:33,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879927709] [2021-06-05 23:44:33,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879927709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:33,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119828806] [2021-06-05 23:44:33,293 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 [2021-06-05 23:44:33,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:44:33,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:33,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:44:33,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:33,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:33,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:33,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:44:33,549 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:33,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:33,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:33,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:44:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:33,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119828806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:33,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:33,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:44:33,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648219899] [2021-06-05 23:44:33,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:33,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:33,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:33,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:33,606 INFO L87 Difference]: Start difference. First operand 7435 states and 25402 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:34,990 INFO L93 Difference]: Finished difference Result 10176 states and 34003 transitions. [2021-06-05 23:44:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:44:34,990 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:35,007 INFO L225 Difference]: With dead ends: 10176 [2021-06-05 23:44:35,007 INFO L226 Difference]: Without dead ends: 10123 [2021-06-05 23:44:35,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1044.6ms TimeCoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:44:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2021-06-05 23:44:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 7439. [2021-06-05 23:44:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 7438 states have (on average 3.4167787039526756) internal successors, (25414), 7438 states have internal predecessors, (25414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 25414 transitions. [2021-06-05 23:44:35,153 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 25414 transitions. Word has length 30 [2021-06-05 23:44:35,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:35,153 INFO L482 AbstractCegarLoop]: Abstraction has 7439 states and 25414 transitions. [2021-06-05 23:44:35,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:35,153 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 25414 transitions. [2021-06-05 23:44:35,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:35,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:35,164 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:35,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:35,365 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:35,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2112307908, now seen corresponding path program 96 times [2021-06-05 23:44:35,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:35,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453430326] [2021-06-05 23:44:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:35,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:35,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453430326] [2021-06-05 23:44:35,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453430326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:35,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842476432] [2021-06-05 23:44:35,576 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 [2021-06-05 23:44:35,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:44:35,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:35,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:44:35,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:35,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:35,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:35,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:35,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 23:44:35,773 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:35,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:35,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:35,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 23:44:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:35,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842476432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:35,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:35,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:44:35,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346423258] [2021-06-05 23:44:35,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:44:35,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:44:35,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:44:35,844 INFO L87 Difference]: Start difference. First operand 7439 states and 25414 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:36,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:36,392 INFO L93 Difference]: Finished difference Result 9163 states and 30845 transitions. [2021-06-05 23:44:36,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:44:36,392 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:36,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:36,408 INFO L225 Difference]: With dead ends: 9163 [2021-06-05 23:44:36,408 INFO L226 Difference]: Without dead ends: 9128 [2021-06-05 23:44:36,408 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 498.0ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:36,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9128 states. [2021-06-05 23:44:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9128 to 7444. [2021-06-05 23:44:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 3.4167674324869006) internal successors, (25431), 7443 states have internal predecessors, (25431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:36,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 25431 transitions. [2021-06-05 23:44:36,531 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 25431 transitions. Word has length 30 [2021-06-05 23:44:36,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:36,532 INFO L482 AbstractCegarLoop]: Abstraction has 7444 states and 25431 transitions. [2021-06-05 23:44:36,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:36,532 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 25431 transitions. [2021-06-05 23:44:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:36,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:36,542 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:36,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:36,742 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:36,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:36,742 INFO L82 PathProgramCache]: Analyzing trace with hash 697570062, now seen corresponding path program 97 times [2021-06-05 23:44:36,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:36,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818393547] [2021-06-05 23:44:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:36,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:36,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818393547] [2021-06-05 23:44:36,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818393547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:36,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348174463] [2021-06-05 23:44:36,954 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 [2021-06-05 23:44:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:44:36,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:37,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:37,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:37,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:44:37,151 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:37,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:37,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:37,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:44:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:37,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348174463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:37,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:37,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:44:37,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441027401] [2021-06-05 23:44:37,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:44:37,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:37,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:44:37,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:44:37,201 INFO L87 Difference]: Start difference. First operand 7444 states and 25431 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:37,850 INFO L93 Difference]: Finished difference Result 9484 states and 31723 transitions. [2021-06-05 23:44:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:44:37,850 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:37,867 INFO L225 Difference]: With dead ends: 9484 [2021-06-05 23:44:37,867 INFO L226 Difference]: Without dead ends: 9449 [2021-06-05 23:44:37,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 591.0ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:44:37,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-06-05 23:44:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 7453. [2021-06-05 23:44:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.416935050993022) internal successors, (25463), 7452 states have internal predecessors, (25463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 25463 transitions. [2021-06-05 23:44:38,010 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 25463 transitions. Word has length 30 [2021-06-05 23:44:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:38,010 INFO L482 AbstractCegarLoop]: Abstraction has 7453 states and 25463 transitions. [2021-06-05 23:44:38,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 25463 transitions. [2021-06-05 23:44:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:38,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:38,020 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:38,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:38,225 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:38,225 INFO L82 PathProgramCache]: Analyzing trace with hash -992372842, now seen corresponding path program 98 times [2021-06-05 23:44:38,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:38,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712193499] [2021-06-05 23:44:38,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:38,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:38,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712193499] [2021-06-05 23:44:38,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712193499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:38,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497744842] [2021-06-05 23:44:38,437 INFO L93 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 [2021-06-05 23:44:38,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:38,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:38,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:44:38,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:38,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:38,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:38,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:44:38,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:38,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:38,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:38,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:44:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:38,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497744842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:38,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:38,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:44:38,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424439745] [2021-06-05 23:44:38,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:44:38,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:38,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:44:38,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:44:38,694 INFO L87 Difference]: Start difference. First operand 7453 states and 25463 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:39,221 INFO L93 Difference]: Finished difference Result 8692 states and 29282 transitions. [2021-06-05 23:44:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:44:39,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:39,235 INFO L225 Difference]: With dead ends: 8692 [2021-06-05 23:44:39,235 INFO L226 Difference]: Without dead ends: 8666 [2021-06-05 23:44:39,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 485.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8666 states. [2021-06-05 23:44:39,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8666 to 7455. [2021-06-05 23:44:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 3.4174939629729004) internal successors, (25474), 7454 states have internal predecessors, (25474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 25474 transitions. [2021-06-05 23:44:39,354 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 25474 transitions. Word has length 30 [2021-06-05 23:44:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:39,354 INFO L482 AbstractCegarLoop]: Abstraction has 7455 states and 25474 transitions. [2021-06-05 23:44:39,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 25474 transitions. [2021-06-05 23:44:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:39,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:39,364 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:39,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 23:44:39,567 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:39,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:39,567 INFO L82 PathProgramCache]: Analyzing trace with hash 961333420, now seen corresponding path program 99 times [2021-06-05 23:44:39,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:39,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238156445] [2021-06-05 23:44:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:39,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:39,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238156445] [2021-06-05 23:44:39,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238156445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:39,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667496262] [2021-06-05 23:44:39,751 INFO L93 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 [2021-06-05 23:44:39,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:44:39,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:39,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:44:39,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:40,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:40,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:40,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:44:40,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:40,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:40,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:40,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:53 [2021-06-05 23:44:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:40,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667496262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:40,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:40,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 23:44:40,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569137369] [2021-06-05 23:44:40,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:44:40,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:40,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:44:40,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:44:40,172 INFO L87 Difference]: Start difference. First operand 7455 states and 25474 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:43,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:43,162 INFO L93 Difference]: Finished difference Result 9935 states and 33090 transitions. [2021-06-05 23:44:43,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:44:43,163 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:43,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:43,178 INFO L225 Difference]: With dead ends: 9935 [2021-06-05 23:44:43,178 INFO L226 Difference]: Without dead ends: 9895 [2021-06-05 23:44:43,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1984.3ms TimeCoverageRelationStatistics Valid=403, Invalid=3629, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:44:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9895 states. [2021-06-05 23:44:43,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9895 to 7459. [2021-06-05 23:44:43,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7459 states, 7458 states have (on average 3.417538213998391) internal successors, (25488), 7458 states have internal predecessors, (25488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7459 states to 7459 states and 25488 transitions. [2021-06-05 23:44:43,302 INFO L78 Accepts]: Start accepts. Automaton has 7459 states and 25488 transitions. Word has length 30 [2021-06-05 23:44:43,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:43,302 INFO L482 AbstractCegarLoop]: Abstraction has 7459 states and 25488 transitions. [2021-06-05 23:44:43,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 7459 states and 25488 transitions. [2021-06-05 23:44:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:43,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:43,311 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:43,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 23:44:43,512 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:43,512 INFO L82 PathProgramCache]: Analyzing trace with hash -542447488, now seen corresponding path program 100 times [2021-06-05 23:44:43,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:43,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39130337] [2021-06-05 23:44:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:43,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:43,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39130337] [2021-06-05 23:44:43,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39130337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:43,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990268559] [2021-06-05 23:44:43,692 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:44:43,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:43,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:43,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:43,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:43,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:43,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:43,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:44:43,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:43,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:43,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:43,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:44:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:43,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990268559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:43,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:43,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:44:43,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675579635] [2021-06-05 23:44:43,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:43,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:43,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:43,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:43,965 INFO L87 Difference]: Start difference. First operand 7459 states and 25488 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:44,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:44,862 INFO L93 Difference]: Finished difference Result 9448 states and 31860 transitions. [2021-06-05 23:44:44,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:44:44,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:44,878 INFO L225 Difference]: With dead ends: 9448 [2021-06-05 23:44:44,878 INFO L226 Difference]: Without dead ends: 9433 [2021-06-05 23:44:44,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 773.8ms TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:44:44,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-06-05 23:44:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 7463. [2021-06-05 23:44:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7463 states, 7462 states have (on average 3.4178504422406863) internal successors, (25504), 7462 states have internal predecessors, (25504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7463 states to 7463 states and 25504 transitions. [2021-06-05 23:44:44,990 INFO L78 Accepts]: Start accepts. Automaton has 7463 states and 25504 transitions. Word has length 30 [2021-06-05 23:44:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:44,991 INFO L482 AbstractCegarLoop]: Abstraction has 7463 states and 25504 transitions. [2021-06-05 23:44:44,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 7463 states and 25504 transitions. [2021-06-05 23:44:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:45,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:45,000 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:45,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:45,200 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:45,200 INFO L82 PathProgramCache]: Analyzing trace with hash -796111322, now seen corresponding path program 101 times [2021-06-05 23:44:45,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:45,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386494652] [2021-06-05 23:44:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:45,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:45,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386494652] [2021-06-05 23:44:45,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386494652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:45,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251829276] [2021-06-05 23:44:45,402 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 [2021-06-05 23:44:45,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:44:45,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:45,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:45,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:45,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:45,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:44:45,647 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:45,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:45,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:45,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:44:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:45,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251829276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:45,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:45,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:44:45,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737290908] [2021-06-05 23:44:45,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:45,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:45,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:45,702 INFO L87 Difference]: Start difference. First operand 7463 states and 25504 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:46,826 INFO L93 Difference]: Finished difference Result 9840 states and 33135 transitions. [2021-06-05 23:44:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:44:46,827 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:46,843 INFO L225 Difference]: With dead ends: 9840 [2021-06-05 23:44:46,843 INFO L226 Difference]: Without dead ends: 9825 [2021-06-05 23:44:46,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 982.5ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:44:46,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9825 states. [2021-06-05 23:44:46,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9825 to 7460. [2021-06-05 23:44:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7460 states, 7459 states have (on average 3.417482236224695) internal successors, (25491), 7459 states have internal predecessors, (25491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7460 states to 7460 states and 25491 transitions. [2021-06-05 23:44:46,977 INFO L78 Accepts]: Start accepts. Automaton has 7460 states and 25491 transitions. Word has length 30 [2021-06-05 23:44:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:46,977 INFO L482 AbstractCegarLoop]: Abstraction has 7460 states and 25491 transitions. [2021-06-05 23:44:46,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:46,977 INFO L276 IsEmpty]: Start isEmpty. Operand 7460 states and 25491 transitions. [2021-06-05 23:44:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:46,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:46,987 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:47,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:47,188 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:47,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1339332396, now seen corresponding path program 102 times [2021-06-05 23:44:47,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:47,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936871998] [2021-06-05 23:44:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:47,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:47,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936871998] [2021-06-05 23:44:47,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936871998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:47,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214325421] [2021-06-05 23:44:47,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:44:47,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:44:47,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:47,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:47,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:47,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:47,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 23:44:47,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:47,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:47,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:47,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:48 [2021-06-05 23:44:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:47,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214325421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:47,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:47,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 23:44:47,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018357911] [2021-06-05 23:44:47,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:44:47,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:47,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:44:47,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:44:47,870 INFO L87 Difference]: Start difference. First operand 7460 states and 25491 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:50,567 INFO L93 Difference]: Finished difference Result 9693 states and 32346 transitions. [2021-06-05 23:44:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:44:50,568 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:50,584 INFO L225 Difference]: With dead ends: 9693 [2021-06-05 23:44:50,584 INFO L226 Difference]: Without dead ends: 9650 [2021-06-05 23:44:50,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1665.1ms TimeCoverageRelationStatistics Valid=281, Invalid=2911, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:44:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9650 states. [2021-06-05 23:44:50,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9650 to 7448. [2021-06-05 23:44:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7448 states, 7447 states have (on average 3.4157378810259167) internal successors, (25437), 7447 states have internal predecessors, (25437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7448 states to 7448 states and 25437 transitions. [2021-06-05 23:44:50,717 INFO L78 Accepts]: Start accepts. Automaton has 7448 states and 25437 transitions. Word has length 30 [2021-06-05 23:44:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:50,717 INFO L482 AbstractCegarLoop]: Abstraction has 7448 states and 25437 transitions. [2021-06-05 23:44:50,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:50,717 INFO L276 IsEmpty]: Start isEmpty. Operand 7448 states and 25437 transitions. [2021-06-05 23:44:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:50,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:50,726 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:50,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:50,927 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:50,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:50,927 INFO L82 PathProgramCache]: Analyzing trace with hash -508670674, now seen corresponding path program 103 times [2021-06-05 23:44:50,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:50,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016555628] [2021-06-05 23:44:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:51,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:51,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016555628] [2021-06-05 23:44:51,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016555628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:51,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844691249] [2021-06-05 23:44:51,131 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 [2021-06-05 23:44:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:51,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:51,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:51,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:51,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:51,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:44:51,352 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:51,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:51,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:51,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:44:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:51,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844691249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:51,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:51,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:44:51,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645015510] [2021-06-05 23:44:51,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:51,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:51,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:51,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:51,406 INFO L87 Difference]: Start difference. First operand 7448 states and 25437 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:52,274 INFO L93 Difference]: Finished difference Result 9634 states and 32382 transitions. [2021-06-05 23:44:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:44:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:52,289 INFO L225 Difference]: With dead ends: 9634 [2021-06-05 23:44:52,289 INFO L226 Difference]: Without dead ends: 9615 [2021-06-05 23:44:52,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 609.8ms TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:44:52,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2021-06-05 23:44:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 7445. [2021-06-05 23:44:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7445 states, 7444 states have (on average 3.415368081676518) internal successors, (25424), 7444 states have internal predecessors, (25424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7445 states to 7445 states and 25424 transitions. [2021-06-05 23:44:52,421 INFO L78 Accepts]: Start accepts. Automaton has 7445 states and 25424 transitions. Word has length 30 [2021-06-05 23:44:52,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:52,421 INFO L482 AbstractCegarLoop]: Abstraction has 7445 states and 25424 transitions. [2021-06-05 23:44:52,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7445 states and 25424 transitions. [2021-06-05 23:44:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:52,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:52,430 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:52,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 23:44:52,631 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:52,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:52,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1583656386, now seen corresponding path program 104 times [2021-06-05 23:44:52,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:52,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676049111] [2021-06-05 23:44:52,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:52,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:52,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676049111] [2021-06-05 23:44:52,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676049111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:52,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423688476] [2021-06-05 23:44:52,872 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 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 [2021-06-05 23:44:52,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:52,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:52,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:44:52,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:53,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:53,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:53,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:53,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 23:44:53,054 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:53,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:53,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:53,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 23:44:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:53,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423688476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:53,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:53,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:44:53,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424577133] [2021-06-05 23:44:53,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:44:53,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:53,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:44:53,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:44:53,154 INFO L87 Difference]: Start difference. First operand 7445 states and 25424 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:54,077 INFO L93 Difference]: Finished difference Result 9544 states and 32087 transitions. [2021-06-05 23:44:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:44:54,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:54,093 INFO L225 Difference]: With dead ends: 9544 [2021-06-05 23:44:54,093 INFO L226 Difference]: Without dead ends: 9518 [2021-06-05 23:44:54,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 813.2ms TimeCoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:44:54,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-06-05 23:44:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 7416. [2021-06-05 23:44:54,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 7415 states have (on average 3.4163182737693862) internal successors, (25332), 7415 states have internal predecessors, (25332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:54,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 25332 transitions. [2021-06-05 23:44:54,217 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 25332 transitions. Word has length 30 [2021-06-05 23:44:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:54,217 INFO L482 AbstractCegarLoop]: Abstraction has 7416 states and 25332 transitions. [2021-06-05 23:44:54,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 25332 transitions. [2021-06-05 23:44:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:54,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:54,226 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:54,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:54,429 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:54,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:54,429 INFO L82 PathProgramCache]: Analyzing trace with hash -416146950, now seen corresponding path program 105 times [2021-06-05 23:44:54,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:54,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229241809] [2021-06-05 23:44:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:54,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:54,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229241809] [2021-06-05 23:44:54,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229241809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:54,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811911091] [2021-06-05 23:44:54,631 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 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 [2021-06-05 23:44:54,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:44:54,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:54,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:44:54,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:54,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:54,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:54,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:54,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 23:44:54,864 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:54,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:54,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:54,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 23:44:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:54,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811911091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:54,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:54,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:44:54,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587941757] [2021-06-05 23:44:54,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:44:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:54,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:44:54,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:44:54,930 INFO L87 Difference]: Start difference. First operand 7416 states and 25332 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:56,364 INFO L93 Difference]: Finished difference Result 9828 states and 32975 transitions. [2021-06-05 23:44:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:44:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:56,380 INFO L225 Difference]: With dead ends: 9828 [2021-06-05 23:44:56,381 INFO L226 Difference]: Without dead ends: 9778 [2021-06-05 23:44:56,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1074.8ms TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:44:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-06-05 23:44:56,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 7415. [2021-06-05 23:44:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7415 states, 7414 states have (on average 3.4136768276234153) internal successors, (25309), 7414 states have internal predecessors, (25309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7415 states to 7415 states and 25309 transitions. [2021-06-05 23:44:56,516 INFO L78 Accepts]: Start accepts. Automaton has 7415 states and 25309 transitions. Word has length 30 [2021-06-05 23:44:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:56,516 INFO L482 AbstractCegarLoop]: Abstraction has 7415 states and 25309 transitions. [2021-06-05 23:44:56,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:56,516 INFO L276 IsEmpty]: Start isEmpty. Operand 7415 states and 25309 transitions. [2021-06-05 23:44:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:56,526 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:56,526 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:56,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:56,727 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:56,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:56,727 INFO L82 PathProgramCache]: Analyzing trace with hash 519931620, now seen corresponding path program 106 times [2021-06-05 23:44:56,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:56,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384305527] [2021-06-05 23:44:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:56,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:56,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384305527] [2021-06-05 23:44:56,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384305527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:56,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953784493] [2021-06-05 23:44:56,922 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:44:56,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:56,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:56,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:44:56,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:57,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:57,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:57,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:44:57,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:57,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:57,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:57,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:44:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:57,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953784493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:57,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:57,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:44:57,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191606343] [2021-06-05 23:44:57,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:44:57,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:57,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:44:57,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:44:57,232 INFO L87 Difference]: Start difference. First operand 7415 states and 25309 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:58,022 INFO L93 Difference]: Finished difference Result 9105 states and 30683 transitions. [2021-06-05 23:44:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:44:58,022 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:58,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:58,038 INFO L225 Difference]: With dead ends: 9105 [2021-06-05 23:44:58,038 INFO L226 Difference]: Without dead ends: 9083 [2021-06-05 23:44:58,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 600.8ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:44:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2021-06-05 23:44:58,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 7434. [2021-06-05 23:44:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7434 states, 7433 states have (on average 3.4138302166016414) internal successors, (25375), 7433 states have internal predecessors, (25375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7434 states to 7434 states and 25375 transitions. [2021-06-05 23:44:58,158 INFO L78 Accepts]: Start accepts. Automaton has 7434 states and 25375 transitions. Word has length 30 [2021-06-05 23:44:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:58,158 INFO L482 AbstractCegarLoop]: Abstraction has 7434 states and 25375 transitions. [2021-06-05 23:44:58,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 7434 states and 25375 transitions. [2021-06-05 23:44:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:44:58,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:58,168 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:58,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-06-05 23:44:58,369 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1969487540, now seen corresponding path program 107 times [2021-06-05 23:44:58,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:58,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383748786] [2021-06-05 23:44:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:58,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:58,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383748786] [2021-06-05 23:44:58,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383748786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:58,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991024869] [2021-06-05 23:44:58,570 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 [2021-06-05 23:44:58,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:44:58,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:58,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:44:58,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:58,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:58,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:44:58,800 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:58,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:58,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:58,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:44:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:58,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991024869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:58,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:58,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:44:58,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888952332] [2021-06-05 23:44:58,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:44:58,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:58,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:44:58,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:44:58,910 INFO L87 Difference]: Start difference. First operand 7434 states and 25375 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:59,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:59,989 INFO L93 Difference]: Finished difference Result 9842 states and 33046 transitions. [2021-06-05 23:44:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:44:59,989 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:44:59,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:00,005 INFO L225 Difference]: With dead ends: 9842 [2021-06-05 23:45:00,006 INFO L226 Difference]: Without dead ends: 9816 [2021-06-05 23:45:00,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 856.6ms TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:45:00,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-06-05 23:45:00,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 7432. [2021-06-05 23:45:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7432 states, 7431 states have (on average 3.4128650248957073) internal successors, (25361), 7431 states have internal predecessors, (25361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7432 states to 7432 states and 25361 transitions. [2021-06-05 23:45:00,137 INFO L78 Accepts]: Start accepts. Automaton has 7432 states and 25361 transitions. Word has length 30 [2021-06-05 23:45:00,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:00,138 INFO L482 AbstractCegarLoop]: Abstraction has 7432 states and 25361 transitions. [2021-06-05 23:45:00,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:00,138 INFO L276 IsEmpty]: Start isEmpty. Operand 7432 states and 25361 transitions. [2021-06-05 23:45:00,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:00,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:00,147 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:00,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:00,348 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:00,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:00,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1689012902, now seen corresponding path program 108 times [2021-06-05 23:45:00,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:00,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793424453] [2021-06-05 23:45:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:00,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:00,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793424453] [2021-06-05 23:45:00,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793424453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:00,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723901412] [2021-06-05 23:45:00,541 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 [2021-06-05 23:45:00,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:45:00,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:00,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:45:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:00,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:00,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:00,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:00,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 23:45:00,716 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:00,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:00,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:00,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 23:45:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:00,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723901412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:00,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:00,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:45:00,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180111473] [2021-06-05 23:45:00,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:45:00,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:00,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:45:00,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:45:00,791 INFO L87 Difference]: Start difference. First operand 7432 states and 25361 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:02,139 INFO L93 Difference]: Finished difference Result 9757 states and 32809 transitions. [2021-06-05 23:45:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:45:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:02,159 INFO L225 Difference]: With dead ends: 9757 [2021-06-05 23:45:02,160 INFO L226 Difference]: Without dead ends: 9713 [2021-06-05 23:45:02,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1009.9ms TimeCoverageRelationStatistics Valid=308, Invalid=1854, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:45:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9713 states. [2021-06-05 23:45:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9713 to 7399. [2021-06-05 23:45:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 3.4138956474722897) internal successors, (25256), 7398 states have internal predecessors, (25256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 25256 transitions. [2021-06-05 23:45:02,339 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 25256 transitions. Word has length 30 [2021-06-05 23:45:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:02,339 INFO L482 AbstractCegarLoop]: Abstraction has 7399 states and 25256 transitions. [2021-06-05 23:45:02,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 25256 transitions. [2021-06-05 23:45:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:02,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:02,350 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:02,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:02,551 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:02,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:02,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1746001132, now seen corresponding path program 109 times [2021-06-05 23:45:02,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:02,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240725394] [2021-06-05 23:45:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:02,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:02,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240725394] [2021-06-05 23:45:02,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240725394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:02,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735929925] [2021-06-05 23:45:02,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:45:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:02,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:45:02,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:02,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:02,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:02,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:45:02,955 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:02,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:02,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:02,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 23:45:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:03,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735929925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:03,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:03,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:45:03,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568283614] [2021-06-05 23:45:03,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:45:03,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:45:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:45:03,040 INFO L87 Difference]: Start difference. First operand 7399 states and 25256 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:04,134 INFO L93 Difference]: Finished difference Result 9549 states and 32090 transitions. [2021-06-05 23:45:04,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:45:04,134 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:04,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:04,151 INFO L225 Difference]: With dead ends: 9549 [2021-06-05 23:45:04,151 INFO L226 Difference]: Without dead ends: 9511 [2021-06-05 23:45:04,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:45:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9511 states. [2021-06-05 23:45:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9511 to 7411. [2021-06-05 23:45:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 7410 states have (on average 3.414574898785425) internal successors, (25302), 7410 states have internal predecessors, (25302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 25302 transitions. [2021-06-05 23:45:04,283 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 25302 transitions. Word has length 30 [2021-06-05 23:45:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:04,283 INFO L482 AbstractCegarLoop]: Abstraction has 7411 states and 25302 transitions. [2021-06-05 23:45:04,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 25302 transitions. [2021-06-05 23:45:04,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:04,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:04,294 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:04,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:04,494 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:04,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:04,495 INFO L82 PathProgramCache]: Analyzing trace with hash 298416662, now seen corresponding path program 110 times [2021-06-05 23:45:04,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:04,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742550503] [2021-06-05 23:45:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:04,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:04,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742550503] [2021-06-05 23:45:04,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742550503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:04,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744651513] [2021-06-05 23:45:04,755 INFO L93 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 [2021-06-05 23:45:04,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:45:04,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:04,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:45:04,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:04,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:04,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:45:04,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:04,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:04,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:04,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:7 [2021-06-05 23:45:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:05,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744651513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:05,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:05,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:45:05,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888515574] [2021-06-05 23:45:05,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:45:05,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:05,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:45:05,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:45:05,022 INFO L87 Difference]: Start difference. First operand 7411 states and 25302 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:06,292 INFO L93 Difference]: Finished difference Result 9078 states and 30424 transitions. [2021-06-05 23:45:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:45:06,293 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:06,309 INFO L225 Difference]: With dead ends: 9078 [2021-06-05 23:45:06,309 INFO L226 Difference]: Without dead ends: 9045 [2021-06-05 23:45:06,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 934.4ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:45:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9045 states. [2021-06-05 23:45:06,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9045 to 7438. [2021-06-05 23:45:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 7437 states have (on average 3.412800860562055) internal successors, (25381), 7437 states have internal predecessors, (25381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 25381 transitions. [2021-06-05 23:45:06,431 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 25381 transitions. Word has length 30 [2021-06-05 23:45:06,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:06,431 INFO L482 AbstractCegarLoop]: Abstraction has 7438 states and 25381 transitions. [2021-06-05 23:45:06,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:06,431 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 25381 transitions. [2021-06-05 23:45:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:06,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:06,441 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:06,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 23:45:06,642 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:06,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:06,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1937279850, now seen corresponding path program 111 times [2021-06-05 23:45:06,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:06,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050096692] [2021-06-05 23:45:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:06,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:06,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050096692] [2021-06-05 23:45:06,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050096692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:06,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635048479] [2021-06-05 23:45:06,911 INFO L93 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 [2021-06-05 23:45:06,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:45:06,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:06,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:45:06,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:07,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:07,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:07,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:45:07,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:07,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:07,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:07,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:45:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:07,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635048479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:07,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:07,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:45:07,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363636265] [2021-06-05 23:45:07,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:45:07,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:07,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:45:07,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:45:07,156 INFO L87 Difference]: Start difference. First operand 7438 states and 25381 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:08,933 INFO L93 Difference]: Finished difference Result 9393 states and 31341 transitions. [2021-06-05 23:45:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:45:08,933 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:08,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:08,949 INFO L225 Difference]: With dead ends: 9393 [2021-06-05 23:45:08,949 INFO L226 Difference]: Without dead ends: 9360 [2021-06-05 23:45:08,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1295.2ms TimeCoverageRelationStatistics Valid=311, Invalid=2041, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:45:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2021-06-05 23:45:09,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 7433. [2021-06-05 23:45:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7432 states have (on average 3.4122712594187297) internal successors, (25360), 7432 states have internal predecessors, (25360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:09,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 25360 transitions. [2021-06-05 23:45:09,077 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 25360 transitions. Word has length 30 [2021-06-05 23:45:09,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:09,077 INFO L482 AbstractCegarLoop]: Abstraction has 7433 states and 25360 transitions. [2021-06-05 23:45:09,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:09,077 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 25360 transitions. [2021-06-05 23:45:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:09,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:09,087 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:09,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:09,288 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:09,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1168264038, now seen corresponding path program 112 times [2021-06-05 23:45:09,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:09,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327685560] [2021-06-05 23:45:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:09,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:09,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327685560] [2021-06-05 23:45:09,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327685560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:09,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735291857] [2021-06-05 23:45:09,572 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 23:45:09,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:45:09,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:09,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:45:09,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:09,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:09,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:09,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:45:09,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:09,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:09,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:09,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:45:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:09,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735291857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:09,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:09,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 23:45:09,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796131773] [2021-06-05 23:45:09,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:45:09,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:09,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:45:09,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:45:09,822 INFO L87 Difference]: Start difference. First operand 7433 states and 25360 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:10,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:10,305 INFO L93 Difference]: Finished difference Result 7974 states and 26897 transitions. [2021-06-05 23:45:10,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:45:10,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:10,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:10,319 INFO L225 Difference]: With dead ends: 7974 [2021-06-05 23:45:10,319 INFO L226 Difference]: Without dead ends: 7948 [2021-06-05 23:45:10,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:45:10,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2021-06-05 23:45:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 7410. [2021-06-05 23:45:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.4130112025914427) internal successors, (25287), 7409 states have internal predecessors, (25287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 25287 transitions. [2021-06-05 23:45:10,437 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 25287 transitions. Word has length 30 [2021-06-05 23:45:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:10,437 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 25287 transitions. [2021-06-05 23:45:10,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 25287 transitions. [2021-06-05 23:45:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:10,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:10,447 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:10,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:10,648 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1252420240, now seen corresponding path program 113 times [2021-06-05 23:45:10,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:10,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685629886] [2021-06-05 23:45:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:10,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685629886] [2021-06-05 23:45:10,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685629886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:10,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840807359] [2021-06-05 23:45:10,865 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 [2021-06-05 23:45:10,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:45:10,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:10,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:45:10,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:11,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:11,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:11,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:45:11,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:11,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:11,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:11,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:45:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:11,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840807359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:11,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:11,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:45:11,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016936650] [2021-06-05 23:45:11,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:45:11,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:11,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:45:11,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:45:11,126 INFO L87 Difference]: Start difference. First operand 7410 states and 25287 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:12,354 INFO L93 Difference]: Finished difference Result 9196 states and 30718 transitions. [2021-06-05 23:45:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:45:12,354 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:12,370 INFO L225 Difference]: With dead ends: 9196 [2021-06-05 23:45:12,370 INFO L226 Difference]: Without dead ends: 9170 [2021-06-05 23:45:12,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 986.9ms TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:45:12,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2021-06-05 23:45:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 7390. [2021-06-05 23:45:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7390 states, 7389 states have (on average 3.4141291108404386) internal successors, (25227), 7389 states have internal predecessors, (25227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7390 states to 7390 states and 25227 transitions. [2021-06-05 23:45:12,482 INFO L78 Accepts]: Start accepts. Automaton has 7390 states and 25227 transitions. Word has length 30 [2021-06-05 23:45:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:12,482 INFO L482 AbstractCegarLoop]: Abstraction has 7390 states and 25227 transitions. [2021-06-05 23:45:12,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 7390 states and 25227 transitions. [2021-06-05 23:45:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:12,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:12,492 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:12,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-06-05 23:45:12,692 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:12,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:12,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1782395603, now seen corresponding path program 34 times [2021-06-05 23:45:12,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:12,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572758875] [2021-06-05 23:45:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:12,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:12,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572758875] [2021-06-05 23:45:12,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572758875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:12,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710142588] [2021-06-05 23:45:12,822 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 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 [2021-06-05 23:45:12,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:45:12,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:12,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:45:12,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:12,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:45:12,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:12,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:12,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:12,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 23:45:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:12,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710142588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:12,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:12,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 23:45:12,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170490320] [2021-06-05 23:45:12,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:45:12,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:12,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:45:12,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:45:12,968 INFO L87 Difference]: Start difference. First operand 7390 states and 25227 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:13,125 INFO L93 Difference]: Finished difference Result 8178 states and 27562 transitions. [2021-06-05 23:45:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:45:13,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:13,139 INFO L225 Difference]: With dead ends: 8178 [2021-06-05 23:45:13,139 INFO L226 Difference]: Without dead ends: 8092 [2021-06-05 23:45:13,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:45:13,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8092 states. [2021-06-05 23:45:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8092 to 7410. [2021-06-05 23:45:13,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.4105817249291404) internal successors, (25269), 7409 states have internal predecessors, (25269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 25269 transitions. [2021-06-05 23:45:13,247 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 25269 transitions. Word has length 30 [2021-06-05 23:45:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:13,247 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 25269 transitions. [2021-06-05 23:45:13,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 25269 transitions. [2021-06-05 23:45:13,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:13,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:13,256 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:13,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:13,457 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:13,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:13,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1423069146, now seen corresponding path program 114 times [2021-06-05 23:45:13,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:13,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341618709] [2021-06-05 23:45:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:13,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:13,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341618709] [2021-06-05 23:45:13,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341618709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:13,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921505432] [2021-06-05 23:45:13,679 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 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 [2021-06-05 23:45:13,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:45:13,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:13,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:45:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:13,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:13,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:45:13,903 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:13,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:13,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:13,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:45:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:13,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921505432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:13,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:13,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 23:45:13,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137938287] [2021-06-05 23:45:13,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:45:13,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:13,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:45:13,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:45:13,956 INFO L87 Difference]: Start difference. First operand 7410 states and 25269 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:16,122 INFO L93 Difference]: Finished difference Result 11711 states and 38605 transitions. [2021-06-05 23:45:16,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:45:16,122 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:16,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:16,141 INFO L225 Difference]: With dead ends: 11711 [2021-06-05 23:45:16,141 INFO L226 Difference]: Without dead ends: 11656 [2021-06-05 23:45:16,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 1729.7ms TimeCoverageRelationStatistics Valid=582, Invalid=4530, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:45:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11656 states. [2021-06-05 23:45:16,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11656 to 7487. [2021-06-05 23:45:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7487 states, 7486 states have (on average 3.41170184344109) internal successors, (25540), 7486 states have internal predecessors, (25540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:16,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7487 states to 7487 states and 25540 transitions. [2021-06-05 23:45:16,317 INFO L78 Accepts]: Start accepts. Automaton has 7487 states and 25540 transitions. Word has length 30 [2021-06-05 23:45:16,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:16,317 INFO L482 AbstractCegarLoop]: Abstraction has 7487 states and 25540 transitions. [2021-06-05 23:45:16,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:16,317 INFO L276 IsEmpty]: Start isEmpty. Operand 7487 states and 25540 transitions. [2021-06-05 23:45:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:16,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:16,326 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:16,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:16,527 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:16,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1640634574, now seen corresponding path program 115 times [2021-06-05 23:45:16,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:16,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141157342] [2021-06-05 23:45:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:16,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:16,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141157342] [2021-06-05 23:45:16,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141157342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:16,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617010424] [2021-06-05 23:45:16,767 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 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 [2021-06-05 23:45:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:16,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:45:16,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:16,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:16,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:45:16,957 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:16,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:16,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:16,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:45:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:17,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617010424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:17,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:17,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:45:17,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027440014] [2021-06-05 23:45:17,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:45:17,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:17,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:45:17,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:45:17,010 INFO L87 Difference]: Start difference. First operand 7487 states and 25540 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:18,631 INFO L93 Difference]: Finished difference Result 10792 states and 35822 transitions. [2021-06-05 23:45:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:45:18,631 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:18,649 INFO L225 Difference]: With dead ends: 10792 [2021-06-05 23:45:18,650 INFO L226 Difference]: Without dead ends: 10735 [2021-06-05 23:45:18,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1381.2ms TimeCoverageRelationStatistics Valid=378, Invalid=2072, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:45:18,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10735 states. [2021-06-05 23:45:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10735 to 7475. [2021-06-05 23:45:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7475 states, 7474 states have (on average 3.409017928819909) internal successors, (25479), 7474 states have internal predecessors, (25479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7475 states to 7475 states and 25479 transitions. [2021-06-05 23:45:18,788 INFO L78 Accepts]: Start accepts. Automaton has 7475 states and 25479 transitions. Word has length 30 [2021-06-05 23:45:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:18,788 INFO L482 AbstractCegarLoop]: Abstraction has 7475 states and 25479 transitions. [2021-06-05 23:45:18,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:18,788 INFO L276 IsEmpty]: Start isEmpty. Operand 7475 states and 25479 transitions. [2021-06-05 23:45:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:18,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:18,798 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:18,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:18,998 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:18,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:18,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1876404162, now seen corresponding path program 116 times [2021-06-05 23:45:18,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:18,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720357555] [2021-06-05 23:45:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:19,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:19,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720357555] [2021-06-05 23:45:19,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720357555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:19,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443531636] [2021-06-05 23:45:19,215 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 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 [2021-06-05 23:45:19,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:45:19,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:19,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:45:19,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:19,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:19,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:19,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:45:19,404 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:19,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:19,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:19,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 23:45:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:19,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443531636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:19,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:19,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:45:19,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24389139] [2021-06-05 23:45:19,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:45:19,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:19,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:45:19,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:45:19,491 INFO L87 Difference]: Start difference. First operand 7475 states and 25479 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:20,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:20,582 INFO L93 Difference]: Finished difference Result 9562 states and 32103 transitions. [2021-06-05 23:45:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:45:20,583 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:20,598 INFO L225 Difference]: With dead ends: 9562 [2021-06-05 23:45:20,598 INFO L226 Difference]: Without dead ends: 9491 [2021-06-05 23:45:20,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 775.6ms TimeCoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:45:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2021-06-05 23:45:20,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7458. [2021-06-05 23:45:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.408072951589111) internal successors, (25414), 7457 states have internal predecessors, (25414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:20,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 25414 transitions. [2021-06-05 23:45:20,730 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 25414 transitions. Word has length 30 [2021-06-05 23:45:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:20,730 INFO L482 AbstractCegarLoop]: Abstraction has 7458 states and 25414 transitions. [2021-06-05 23:45:20,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 25414 transitions. [2021-06-05 23:45:20,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:20,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:20,740 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:20,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-05 23:45:20,941 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:20,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:20,941 INFO L82 PathProgramCache]: Analyzing trace with hash 54174113, now seen corresponding path program 35 times [2021-06-05 23:45:20,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:20,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139223103] [2021-06-05 23:45:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:21,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:21,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139223103] [2021-06-05 23:45:21,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139223103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:21,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281965398] [2021-06-05 23:45:21,058 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 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 [2021-06-05 23:45:21,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:45:21,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:21,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:45:21,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:21,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:45:21,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:21,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:21,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:21,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 23:45:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:21,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281965398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:21,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:21,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 23:45:21,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511712299] [2021-06-05 23:45:21,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:45:21,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:21,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:45:21,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:45:21,207 INFO L87 Difference]: Start difference. First operand 7458 states and 25414 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:21,406 INFO L93 Difference]: Finished difference Result 7805 states and 26445 transitions. [2021-06-05 23:45:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:45:21,407 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:21,418 INFO L225 Difference]: With dead ends: 7805 [2021-06-05 23:45:21,418 INFO L226 Difference]: Without dead ends: 7774 [2021-06-05 23:45:21,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:45:21,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7774 states. [2021-06-05 23:45:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7774 to 7430. [2021-06-05 23:45:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.4109570601696055) internal successors, (25340), 7429 states have internal predecessors, (25340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 25340 transitions. [2021-06-05 23:45:21,520 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 25340 transitions. Word has length 30 [2021-06-05 23:45:21,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:21,520 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 25340 transitions. [2021-06-05 23:45:21,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 25340 transitions. [2021-06-05 23:45:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:21,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:21,529 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:21,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:21,730 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:21,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:21,730 INFO L82 PathProgramCache]: Analyzing trace with hash -2093501780, now seen corresponding path program 117 times [2021-06-05 23:45:21,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:21,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735087815] [2021-06-05 23:45:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:21,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:21,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735087815] [2021-06-05 23:45:21,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735087815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:21,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351094292] [2021-06-05 23:45:21,984 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 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 [2021-06-05 23:45:22,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:45:22,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:22,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:45:22,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:22,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:22,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:22,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:45:22,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:22,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:22,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:22,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:45:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:22,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351094292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:22,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:22,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:45:22,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950738061] [2021-06-05 23:45:22,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:45:22,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:22,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:45:22,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:45:22,227 INFO L87 Difference]: Start difference. First operand 7430 states and 25340 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:23,220 INFO L93 Difference]: Finished difference Result 9193 states and 30704 transitions. [2021-06-05 23:45:23,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:45:23,220 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:23,235 INFO L225 Difference]: With dead ends: 9193 [2021-06-05 23:45:23,235 INFO L226 Difference]: Without dead ends: 9160 [2021-06-05 23:45:23,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 899.2ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:45:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9160 states. [2021-06-05 23:45:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9160 to 7443. [2021-06-05 23:45:23,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7443 states, 7442 states have (on average 3.4106423004568662) internal successors, (25382), 7442 states have internal predecessors, (25382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7443 states to 7443 states and 25382 transitions. [2021-06-05 23:45:23,347 INFO L78 Accepts]: Start accepts. Automaton has 7443 states and 25382 transitions. Word has length 30 [2021-06-05 23:45:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:23,347 INFO L482 AbstractCegarLoop]: Abstraction has 7443 states and 25382 transitions. [2021-06-05 23:45:23,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 7443 states and 25382 transitions. [2021-06-05 23:45:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:23,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:23,356 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:23,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:23,557 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:23,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:23,557 INFO L82 PathProgramCache]: Analyzing trace with hash 769171052, now seen corresponding path program 118 times [2021-06-05 23:45:23,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:23,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615356442] [2021-06-05 23:45:23,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:23,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:23,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615356442] [2021-06-05 23:45:23,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615356442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:23,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123329613] [2021-06-05 23:45:23,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:45:23,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:45:23,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:23,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:45:23,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:24,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:24,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:24,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:45:24,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:24,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:24,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:24,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:45:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:24,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123329613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:24,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:24,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:45:24,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146982823] [2021-06-05 23:45:24,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:45:24,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:24,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:45:24,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:45:24,062 INFO L87 Difference]: Start difference. First operand 7443 states and 25382 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:25,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:25,675 INFO L93 Difference]: Finished difference Result 9705 states and 32422 transitions. [2021-06-05 23:45:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:45:25,675 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:25,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:25,692 INFO L225 Difference]: With dead ends: 9705 [2021-06-05 23:45:25,692 INFO L226 Difference]: Without dead ends: 9672 [2021-06-05 23:45:25,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1345.2ms TimeCoverageRelationStatistics Valid=470, Invalid=2392, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:45:25,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9672 states. [2021-06-05 23:45:25,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9672 to 7455. [2021-06-05 23:45:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 3.4097129058223774) internal successors, (25416), 7454 states have internal predecessors, (25416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 25416 transitions. [2021-06-05 23:45:25,824 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 25416 transitions. Word has length 30 [2021-06-05 23:45:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:25,824 INFO L482 AbstractCegarLoop]: Abstraction has 7455 states and 25416 transitions. [2021-06-05 23:45:25,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 25416 transitions. [2021-06-05 23:45:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:25,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:25,835 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:26,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-06-05 23:45:26,035 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:26,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2080023144, now seen corresponding path program 119 times [2021-06-05 23:45:26,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:26,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99782293] [2021-06-05 23:45:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:26,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:26,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99782293] [2021-06-05 23:45:26,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99782293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:26,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983366854] [2021-06-05 23:45:26,298 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 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 [2021-06-05 23:45:26,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:45:26,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:26,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:45:26,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:26,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:26,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 23:45:26,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:26,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:26,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:26,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:35 [2021-06-05 23:45:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:26,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983366854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:26,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:26,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 23:45:26,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942560002] [2021-06-05 23:45:26,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:45:26,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:26,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:45:26,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:45:26,663 INFO L87 Difference]: Start difference. First operand 7455 states and 25416 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:29,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:29,035 INFO L93 Difference]: Finished difference Result 10824 states and 35717 transitions. [2021-06-05 23:45:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:45:29,036 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:29,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:29,055 INFO L225 Difference]: With dead ends: 10824 [2021-06-05 23:45:29,055 INFO L226 Difference]: Without dead ends: 10757 [2021-06-05 23:45:29,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1683.5ms TimeCoverageRelationStatistics Valid=469, Invalid=3191, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:45:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10757 states. [2021-06-05 23:45:29,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10757 to 7452. [2021-06-05 23:45:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7452 states, 7451 states have (on average 3.410146289088713) internal successors, (25409), 7451 states have internal predecessors, (25409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7452 states to 7452 states and 25409 transitions. [2021-06-05 23:45:29,203 INFO L78 Accepts]: Start accepts. Automaton has 7452 states and 25409 transitions. Word has length 30 [2021-06-05 23:45:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:29,203 INFO L482 AbstractCegarLoop]: Abstraction has 7452 states and 25409 transitions. [2021-06-05 23:45:29,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:29,204 INFO L276 IsEmpty]: Start isEmpty. Operand 7452 states and 25409 transitions. [2021-06-05 23:45:29,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:29,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:29,214 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:29,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:29,414 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:29,414 INFO L82 PathProgramCache]: Analyzing trace with hash 169988712, now seen corresponding path program 120 times [2021-06-05 23:45:29,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:29,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372526768] [2021-06-05 23:45:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:29,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:29,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372526768] [2021-06-05 23:45:29,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372526768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:29,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471131222] [2021-06-05 23:45:29,668 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 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 [2021-06-05 23:45:29,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:45:29,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:45:29,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:29,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:29,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:29,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:45:29,897 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:29,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:29,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:29,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:45:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:29,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471131222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:29,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:29,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 23:45:29,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610934892] [2021-06-05 23:45:29,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:45:29,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:29,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:45:29,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:45:29,953 INFO L87 Difference]: Start difference. First operand 7452 states and 25409 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:33,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:33,398 INFO L93 Difference]: Finished difference Result 11741 states and 38704 transitions. [2021-06-05 23:45:33,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 23:45:33,398 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:33,417 INFO L225 Difference]: With dead ends: 11741 [2021-06-05 23:45:33,417 INFO L226 Difference]: Without dead ends: 11682 [2021-06-05 23:45:33,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2537 ImplicationChecksByTransitivity, 2799.5ms TimeCoverageRelationStatistics Valid=1148, Invalid=6508, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 23:45:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11682 states. [2021-06-05 23:45:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11682 to 7513. [2021-06-05 23:45:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7513 states, 7512 states have (on average 3.413738019169329) internal successors, (25644), 7512 states have internal predecessors, (25644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7513 states to 7513 states and 25644 transitions. [2021-06-05 23:45:33,565 INFO L78 Accepts]: Start accepts. Automaton has 7513 states and 25644 transitions. Word has length 30 [2021-06-05 23:45:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:33,565 INFO L482 AbstractCegarLoop]: Abstraction has 7513 states and 25644 transitions. [2021-06-05 23:45:33,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 7513 states and 25644 transitions. [2021-06-05 23:45:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:33,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:33,575 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:33,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 23:45:33,775 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:33,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1544008528, now seen corresponding path program 121 times [2021-06-05 23:45:33,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:33,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517521670] [2021-06-05 23:45:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:34,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:34,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517521670] [2021-06-05 23:45:34,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517521670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:34,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755565821] [2021-06-05 23:45:34,029 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 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 [2021-06-05 23:45:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:34,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:45:34,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:34,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 23:45:34,210 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:34,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:34,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:34,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 23:45:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:34,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755565821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:34,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:34,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:45:34,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428597743] [2021-06-05 23:45:34,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:45:34,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:34,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:45:34,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:45:34,283 INFO L87 Difference]: Start difference. First operand 7513 states and 25644 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:35,439 INFO L93 Difference]: Finished difference Result 11967 states and 39772 transitions. [2021-06-05 23:45:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:45:35,439 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:35,459 INFO L225 Difference]: With dead ends: 11967 [2021-06-05 23:45:35,459 INFO L226 Difference]: Without dead ends: 11882 [2021-06-05 23:45:35,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1048.0ms TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:45:35,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11882 states. [2021-06-05 23:45:35,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11882 to 7506. [2021-06-05 23:45:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7506 states, 7505 states have (on average 3.4131912058627583) internal successors, (25616), 7505 states have internal predecessors, (25616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7506 states to 7506 states and 25616 transitions. [2021-06-05 23:45:35,597 INFO L78 Accepts]: Start accepts. Automaton has 7506 states and 25616 transitions. Word has length 30 [2021-06-05 23:45:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:35,597 INFO L482 AbstractCegarLoop]: Abstraction has 7506 states and 25616 transitions. [2021-06-05 23:45:35,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 7506 states and 25616 transitions. [2021-06-05 23:45:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:35,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:35,607 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:35,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:35,807 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:35,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:35,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1726792916, now seen corresponding path program 122 times [2021-06-05 23:45:35,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:35,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164917178] [2021-06-05 23:45:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:36,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:36,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164917178] [2021-06-05 23:45:36,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164917178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:36,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907934181] [2021-06-05 23:45:36,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:45:36,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:45:36,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:36,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:45:36,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:36,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:36,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:36,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:36,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 23:45:36,202 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:36,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:36,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:36,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:20 [2021-06-05 23:45:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:36,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907934181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:36,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:36,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:45:36,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108222979] [2021-06-05 23:45:36,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:45:36,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:36,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:45:36,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:45:36,274 INFO L87 Difference]: Start difference. First operand 7506 states and 25616 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:38,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:38,741 INFO L93 Difference]: Finished difference Result 12586 states and 41642 transitions. [2021-06-05 23:45:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 23:45:38,742 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:38,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:38,764 INFO L225 Difference]: With dead ends: 12586 [2021-06-05 23:45:38,764 INFO L226 Difference]: Without dead ends: 12498 [2021-06-05 23:45:38,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1884.1ms TimeCoverageRelationStatistics Valid=829, Invalid=4001, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:45:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12498 states. [2021-06-05 23:45:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12498 to 7581. [2021-06-05 23:45:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7581 states, 7580 states have (on average 3.4108179419525064) internal successors, (25854), 7580 states have internal predecessors, (25854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7581 states to 7581 states and 25854 transitions. [2021-06-05 23:45:38,920 INFO L78 Accepts]: Start accepts. Automaton has 7581 states and 25854 transitions. Word has length 30 [2021-06-05 23:45:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:38,920 INFO L482 AbstractCegarLoop]: Abstraction has 7581 states and 25854 transitions. [2021-06-05 23:45:38,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 7581 states and 25854 transitions. [2021-06-05 23:45:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:38,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:38,930 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:39,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:39,130 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:39,131 INFO L82 PathProgramCache]: Analyzing trace with hash -197397320, now seen corresponding path program 123 times [2021-06-05 23:45:39,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:39,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552789452] [2021-06-05 23:45:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:39,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:39,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552789452] [2021-06-05 23:45:39,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552789452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:39,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009323247] [2021-06-05 23:45:39,363 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 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 [2021-06-05 23:45:39,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:45:39,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:39,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:45:39,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:39,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:39,642 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 23:45:39,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 48 [2021-06-05 23:45:39,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:39,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:39,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:39,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:3 [2021-06-05 23:45:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:39,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009323247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:39,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:39,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:45:39,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527817618] [2021-06-05 23:45:39,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:45:39,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:39,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:45:39,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:45:39,673 INFO L87 Difference]: Start difference. First operand 7581 states and 25854 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:43,965 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-05 23:45:44,165 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-05 23:45:44,344 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-06-05 23:45:44,515 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-06-05 23:45:44,700 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-05 23:45:46,363 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-06-05 23:45:46,810 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-05 23:45:47,159 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-05 23:45:47,364 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 23:45:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:49,171 INFO L93 Difference]: Finished difference Result 10935 states and 36351 transitions. [2021-06-05 23:45:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:45:49,171 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:49,190 INFO L225 Difference]: With dead ends: 10935 [2021-06-05 23:45:49,190 INFO L226 Difference]: Without dead ends: 10909 [2021-06-05 23:45:49,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 5568.8ms TimeCoverageRelationStatistics Valid=713, Invalid=3978, Unknown=1, NotChecked=0, Total=4692 [2021-06-05 23:45:49,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-06-05 23:45:49,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 7589. [2021-06-05 23:45:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7588 states have (on average 3.411834475487612) internal successors, (25889), 7588 states have internal predecessors, (25889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 25889 transitions. [2021-06-05 23:45:49,342 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 25889 transitions. Word has length 30 [2021-06-05 23:45:49,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:49,342 INFO L482 AbstractCegarLoop]: Abstraction has 7589 states and 25889 transitions. [2021-06-05 23:45:49,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 25889 transitions. [2021-06-05 23:45:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:49,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:49,351 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:49,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 23:45:49,552 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:49,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:49,552 INFO L82 PathProgramCache]: Analyzing trace with hash 262838404, now seen corresponding path program 124 times [2021-06-05 23:45:49,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:49,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666930909] [2021-06-05 23:45:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:50,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:50,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666930909] [2021-06-05 23:45:50,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666930909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:50,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007858156] [2021-06-05 23:45:50,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:45:50,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:45:50,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:50,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:45:50,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:50,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:50,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:50,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:50,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 23:45:50,651 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:50,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:50,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:50,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 23:45:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:50,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007858156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:50,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:50,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:45:50,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599187659] [2021-06-05 23:45:50,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:45:50,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:50,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:45:50,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:45:50,839 INFO L87 Difference]: Start difference. First operand 7589 states and 25889 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:52,164 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-06-05 23:45:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:52,357 INFO L93 Difference]: Finished difference Result 9231 states and 31088 transitions. [2021-06-05 23:45:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:45:52,358 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:52,376 INFO L225 Difference]: With dead ends: 9231 [2021-06-05 23:45:52,376 INFO L226 Difference]: Without dead ends: 9196 [2021-06-05 23:45:52,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1533.7ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:45:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2021-06-05 23:45:52,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 7585. [2021-06-05 23:45:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 7584 states have (on average 3.411260548523207) internal successors, (25871), 7584 states have internal predecessors, (25871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 25871 transitions. [2021-06-05 23:45:52,494 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 25871 transitions. Word has length 30 [2021-06-05 23:45:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:52,494 INFO L482 AbstractCegarLoop]: Abstraction has 7585 states and 25871 transitions. [2021-06-05 23:45:52,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 25871 transitions. [2021-06-05 23:45:52,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:52,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:52,503 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:52,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:52,704 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:52,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:52,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1222250922, now seen corresponding path program 125 times [2021-06-05 23:45:52,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:52,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468332016] [2021-06-05 23:45:52,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:53,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:53,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468332016] [2021-06-05 23:45:53,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468332016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:53,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552130469] [2021-06-05 23:45:53,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:45:53,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:45:53,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:53,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:45:53,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:53,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:53,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:53,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:45:53,932 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:53,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:53,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:53,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:45:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:54,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552130469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:54,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:54,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:45:54,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832904673] [2021-06-05 23:45:54,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:45:54,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:54,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:45:54,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:45:54,062 INFO L87 Difference]: Start difference. First operand 7585 states and 25871 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:56,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:56,672 INFO L93 Difference]: Finished difference Result 9670 states and 32321 transitions. [2021-06-05 23:45:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:45:56,672 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:45:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:56,687 INFO L225 Difference]: With dead ends: 9670 [2021-06-05 23:45:56,687 INFO L226 Difference]: Without dead ends: 9635 [2021-06-05 23:45:56,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1895.3ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:45:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9635 states. [2021-06-05 23:45:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9635 to 7577. [2021-06-05 23:45:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 3.4107708553326295) internal successors, (25840), 7576 states have internal predecessors, (25840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 25840 transitions. [2021-06-05 23:45:56,815 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 25840 transitions. Word has length 30 [2021-06-05 23:45:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:56,815 INFO L482 AbstractCegarLoop]: Abstraction has 7577 states and 25840 transitions. [2021-06-05 23:45:56,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:56,815 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 25840 transitions. [2021-06-05 23:45:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:45:56,825 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:56,825 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:57,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-06-05 23:45:57,025 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:57,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1382773470, now seen corresponding path program 126 times [2021-06-05 23:45:57,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:57,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753390370] [2021-06-05 23:45:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:57,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:57,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753390370] [2021-06-05 23:45:57,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753390370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:57,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914248292] [2021-06-05 23:45:57,681 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 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 [2021-06-05 23:45:57,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:45:57,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:57,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:45:57,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:58,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:58,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:58,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:58,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 23:45:58,247 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:58,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:58,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:58,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 23:45:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:58,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914248292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:58,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:58,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:45:58,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491756144] [2021-06-05 23:45:58,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:45:58,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:58,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:45:58,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:45:58,483 INFO L87 Difference]: Start difference. First operand 7577 states and 25840 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:59,435 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-06-05 23:45:59,795 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-06-05 23:46:00,192 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-06-05 23:46:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:03,014 INFO L93 Difference]: Finished difference Result 9586 states and 32012 transitions. [2021-06-05 23:46:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:46:03,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:03,030 INFO L225 Difference]: With dead ends: 9586 [2021-06-05 23:46:03,030 INFO L226 Difference]: Without dead ends: 9518 [2021-06-05 23:46:03,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 3213.6ms TimeCoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:46:03,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-06-05 23:46:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 7570. [2021-06-05 23:46:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7570 states, 7569 states have (on average 3.4089047430307833) internal successors, (25802), 7569 states have internal predecessors, (25802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 25802 transitions. [2021-06-05 23:46:03,198 INFO L78 Accepts]: Start accepts. Automaton has 7570 states and 25802 transitions. Word has length 30 [2021-06-05 23:46:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:03,198 INFO L482 AbstractCegarLoop]: Abstraction has 7570 states and 25802 transitions. [2021-06-05 23:46:03,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 7570 states and 25802 transitions. [2021-06-05 23:46:03,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:03,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:03,208 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:03,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:03,409 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:03,409 INFO L82 PathProgramCache]: Analyzing trace with hash -692066666, now seen corresponding path program 127 times [2021-06-05 23:46:03,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:03,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459766683] [2021-06-05 23:46:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:03,736 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-06-05 23:46:03,858 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-06-05 23:46:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:04,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:04,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459766683] [2021-06-05 23:46:04,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459766683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:04,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297823971] [2021-06-05 23:46:04,105 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 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 [2021-06-05 23:46:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:04,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:46:04,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:04,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:04,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:04,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:46:04,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:04,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:04,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:04,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:46:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:04,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297823971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:04,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:04,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:46:04,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064982241] [2021-06-05 23:46:04,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:46:04,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:04,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:46:04,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:46:04,803 INFO L87 Difference]: Start difference. First operand 7570 states and 25802 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:05,266 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-06-05 23:46:05,542 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-06-05 23:46:06,804 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-06-05 23:46:07,425 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-06-05 23:46:07,697 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-06-05 23:46:07,919 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-06-05 23:46:09,115 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-06-05 23:46:10,032 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-05 23:46:10,174 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-05 23:46:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:10,972 INFO L93 Difference]: Finished difference Result 11143 states and 37083 transitions. [2021-06-05 23:46:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:46:10,973 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:10,991 INFO L225 Difference]: With dead ends: 11143 [2021-06-05 23:46:10,991 INFO L226 Difference]: Without dead ends: 11122 [2021-06-05 23:46:10,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 4314.6ms TimeCoverageRelationStatistics Valid=478, Invalid=2492, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:46:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11122 states. [2021-06-05 23:46:11,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11122 to 7564. [2021-06-05 23:46:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7564 states, 7563 states have (on average 3.4084358058971307) internal successors, (25778), 7563 states have internal predecessors, (25778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7564 states to 7564 states and 25778 transitions. [2021-06-05 23:46:11,124 INFO L78 Accepts]: Start accepts. Automaton has 7564 states and 25778 transitions. Word has length 30 [2021-06-05 23:46:11,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:11,124 INFO L482 AbstractCegarLoop]: Abstraction has 7564 states and 25778 transitions. [2021-06-05 23:46:11,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:11,124 INFO L276 IsEmpty]: Start isEmpty. Operand 7564 states and 25778 transitions. [2021-06-05 23:46:11,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:11,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:11,134 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:11,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:11,335 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:11,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:11,335 INFO L82 PathProgramCache]: Analyzing trace with hash -66350155, now seen corresponding path program 36 times [2021-06-05 23:46:11,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:11,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40510243] [2021-06-05 23:46:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:11,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:11,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40510243] [2021-06-05 23:46:11,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40510243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:11,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834653254] [2021-06-05 23:46:11,689 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 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 [2021-06-05 23:46:11,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:46:11,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:11,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:46:11,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:11,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:46:11,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:12,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:12,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:12,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 23:46:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:12,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834653254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:12,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:12,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 23:46:12,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116530680] [2021-06-05 23:46:12,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:46:12,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:12,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:46:12,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:46:12,034 INFO L87 Difference]: Start difference. First operand 7564 states and 25778 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:12,692 INFO L93 Difference]: Finished difference Result 7890 states and 26740 transitions. [2021-06-05 23:46:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:46:12,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:12,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:12,705 INFO L225 Difference]: With dead ends: 7890 [2021-06-05 23:46:12,705 INFO L226 Difference]: Without dead ends: 7861 [2021-06-05 23:46:12,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 667.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:46:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7861 states. [2021-06-05 23:46:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7861 to 7612. [2021-06-05 23:46:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7612 states, 7611 states have (on average 3.408487715149126) internal successors, (25942), 7611 states have internal predecessors, (25942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7612 states to 7612 states and 25942 transitions. [2021-06-05 23:46:12,839 INFO L78 Accepts]: Start accepts. Automaton has 7612 states and 25942 transitions. Word has length 30 [2021-06-05 23:46:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:12,839 INFO L482 AbstractCegarLoop]: Abstraction has 7612 states and 25942 transitions. [2021-06-05 23:46:12,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 7612 states and 25942 transitions. [2021-06-05 23:46:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:12,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:12,849 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:13,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 23:46:13,049 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:13,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:13,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1138574553, now seen corresponding path program 37 times [2021-06-05 23:46:13,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:13,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192776304] [2021-06-05 23:46:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:13,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:13,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192776304] [2021-06-05 23:46:13,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192776304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:13,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749031610] [2021-06-05 23:46:13,423 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 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 [2021-06-05 23:46:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:13,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:46:13,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:13,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:46:13,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:13,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:13,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:13,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 23:46:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:13,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749031610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:13,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:13,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 23:46:13,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972691174] [2021-06-05 23:46:13,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:46:13,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:13,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:46:13,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:46:13,759 INFO L87 Difference]: Start difference. First operand 7612 states and 25942 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:14,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:14,540 INFO L93 Difference]: Finished difference Result 7964 states and 26982 transitions. [2021-06-05 23:46:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:46:14,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:14,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:14,552 INFO L225 Difference]: With dead ends: 7964 [2021-06-05 23:46:14,553 INFO L226 Difference]: Without dead ends: 7927 [2021-06-05 23:46:14,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 675.2ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:46:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-06-05 23:46:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7628. [2021-06-05 23:46:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7628 states, 7627 states have (on average 3.4081552379703686) internal successors, (25994), 7627 states have internal predecessors, (25994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7628 states to 7628 states and 25994 transitions. [2021-06-05 23:46:14,656 INFO L78 Accepts]: Start accepts. Automaton has 7628 states and 25994 transitions. Word has length 30 [2021-06-05 23:46:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:14,657 INFO L482 AbstractCegarLoop]: Abstraction has 7628 states and 25994 transitions. [2021-06-05 23:46:14,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7628 states and 25994 transitions. [2021-06-05 23:46:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:14,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:14,666 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:14,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 23:46:14,866 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash -427658407, now seen corresponding path program 38 times [2021-06-05 23:46:14,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:14,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077642797] [2021-06-05 23:46:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:15,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:15,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077642797] [2021-06-05 23:46:15,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077642797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:15,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199314900] [2021-06-05 23:46:15,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:46:15,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:46:15,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:15,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:46:15,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:15,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:46:15,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:15,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:15,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:15,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 23:46:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:15,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199314900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:15,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:15,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 23:46:15,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196306177] [2021-06-05 23:46:15,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:46:15,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:15,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:46:15,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:46:15,521 INFO L87 Difference]: Start difference. First operand 7628 states and 25994 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:16,247 INFO L93 Difference]: Finished difference Result 8177 states and 27650 transitions. [2021-06-05 23:46:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:46:16,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:16,260 INFO L225 Difference]: With dead ends: 8177 [2021-06-05 23:46:16,261 INFO L226 Difference]: Without dead ends: 8140 [2021-06-05 23:46:16,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 697.1ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:46:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8140 states. [2021-06-05 23:46:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8140 to 7656. [2021-06-05 23:46:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7656 states, 7655 states have (on average 3.4082299150881776) internal successors, (26090), 7655 states have internal predecessors, (26090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:16,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7656 states to 7656 states and 26090 transitions. [2021-06-05 23:46:16,370 INFO L78 Accepts]: Start accepts. Automaton has 7656 states and 26090 transitions. Word has length 30 [2021-06-05 23:46:16,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:16,370 INFO L482 AbstractCegarLoop]: Abstraction has 7656 states and 26090 transitions. [2021-06-05 23:46:16,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:16,370 INFO L276 IsEmpty]: Start isEmpty. Operand 7656 states and 26090 transitions. [2021-06-05 23:46:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:16,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:16,380 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:16,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-05 23:46:16,581 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:16,581 INFO L82 PathProgramCache]: Analyzing trace with hash 53555180, now seen corresponding path program 128 times [2021-06-05 23:46:16,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:16,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552302661] [2021-06-05 23:46:16,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:17,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:17,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552302661] [2021-06-05 23:46:17,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552302661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:17,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220271288] [2021-06-05 23:46:17,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:46:17,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:46:17,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:17,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:46:17,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:17,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:17,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:17,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:46:17,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:17,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:17,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:17,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:46:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:17,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220271288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:17,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:17,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:46:17,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275660388] [2021-06-05 23:46:17,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:17,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:17,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:17,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:17,937 INFO L87 Difference]: Start difference. First operand 7656 states and 26090 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:21,681 INFO L93 Difference]: Finished difference Result 9529 states and 31968 transitions. [2021-06-05 23:46:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:46:21,682 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:21,697 INFO L225 Difference]: With dead ends: 9529 [2021-06-05 23:46:21,698 INFO L226 Difference]: Without dead ends: 9497 [2021-06-05 23:46:21,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2731.3ms TimeCoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:46:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-06-05 23:46:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 7679. [2021-06-05 23:46:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7679 states, 7678 states have (on average 3.40739775983329) internal successors, (26162), 7678 states have internal predecessors, (26162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7679 states to 7679 states and 26162 transitions. [2021-06-05 23:46:21,826 INFO L78 Accepts]: Start accepts. Automaton has 7679 states and 26162 transitions. Word has length 30 [2021-06-05 23:46:21,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:21,826 INFO L482 AbstractCegarLoop]: Abstraction has 7679 states and 26162 transitions. [2021-06-05 23:46:21,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 7679 states and 26162 transitions. [2021-06-05 23:46:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:21,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:21,836 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:22,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 23:46:22,037 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:22,037 INFO L82 PathProgramCache]: Analyzing trace with hash -920787924, now seen corresponding path program 129 times [2021-06-05 23:46:22,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:22,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546348933] [2021-06-05 23:46:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:22,456 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-06-05 23:46:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:22,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:22,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546348933] [2021-06-05 23:46:22,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546348933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:22,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021624017] [2021-06-05 23:46:22,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:46:22,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:46:22,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:22,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:46:22,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:23,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:23,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 23:46:23,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:23,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:23,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:23,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:156 [2021-06-05 23:46:23,856 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 23:46:24,613 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 23:46:24,944 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-06-05 23:46:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:24,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021624017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:24,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:24,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 23:46:24,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317055031] [2021-06-05 23:46:24,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:46:24,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:24,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:46:24,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:46:24,992 INFO L87 Difference]: Start difference. First operand 7679 states and 26162 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:25,902 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 19 [2021-06-05 23:46:26,092 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 18 [2021-06-05 23:46:26,263 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 19 [2021-06-05 23:46:27,108 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 23:46:27,407 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2021-06-05 23:46:27,784 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 25 [2021-06-05 23:46:28,178 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 22 [2021-06-05 23:46:29,142 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2021-06-05 23:46:29,458 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 34 [2021-06-05 23:46:30,165 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-06-05 23:46:30,654 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 29 [2021-06-05 23:46:30,909 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 23 [2021-06-05 23:46:31,283 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 32 [2021-06-05 23:46:31,891 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2021-06-05 23:46:32,593 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-06-05 23:46:33,263 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 23:46:33,686 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 23:46:34,397 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 23:46:34,973 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2021-06-05 23:46:35,279 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 22 [2021-06-05 23:46:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:35,477 INFO L93 Difference]: Finished difference Result 10868 states and 36318 transitions. [2021-06-05 23:46:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:46:35,478 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:35,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:35,498 INFO L225 Difference]: With dead ends: 10868 [2021-06-05 23:46:35,498 INFO L226 Difference]: Without dead ends: 10793 [2021-06-05 23:46:35,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 10209.2ms TimeCoverageRelationStatistics Valid=514, Invalid=3146, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:46:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10793 states. [2021-06-05 23:46:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10793 to 7682. [2021-06-05 23:46:35,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7682 states, 7681 states have (on average 3.406587683895326) internal successors, (26166), 7681 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7682 states to 7682 states and 26166 transitions. [2021-06-05 23:46:35,653 INFO L78 Accepts]: Start accepts. Automaton has 7682 states and 26166 transitions. Word has length 30 [2021-06-05 23:46:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:35,653 INFO L482 AbstractCegarLoop]: Abstraction has 7682 states and 26166 transitions. [2021-06-05 23:46:35,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7682 states and 26166 transitions. [2021-06-05 23:46:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:35,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:35,664 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:35,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:35,865 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:35,865 INFO L82 PathProgramCache]: Analyzing trace with hash 306904492, now seen corresponding path program 130 times [2021-06-05 23:46:35,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:35,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031387559] [2021-06-05 23:46:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:36,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:36,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031387559] [2021-06-05 23:46:36,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031387559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:36,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116322815] [2021-06-05 23:46:36,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:46:36,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:46:36,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:36,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:46:36,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:36,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:36,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:36,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:46:36,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:37,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:37,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:37,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:46:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:37,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116322815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:37,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:37,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:46:37,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756242311] [2021-06-05 23:46:37,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:46:37,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:37,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:46:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:46:37,049 INFO L87 Difference]: Start difference. First operand 7682 states and 26166 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:40,036 INFO L93 Difference]: Finished difference Result 10040 states and 33750 transitions. [2021-06-05 23:46:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:46:40,036 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:40,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:40,052 INFO L225 Difference]: With dead ends: 10040 [2021-06-05 23:46:40,053 INFO L226 Difference]: Without dead ends: 9989 [2021-06-05 23:46:40,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2236.6ms TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:46:40,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9989 states. [2021-06-05 23:46:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9989 to 7724. [2021-06-05 23:46:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7724 states, 7723 states have (on average 3.4080020717337822) internal successors, (26320), 7723 states have internal predecessors, (26320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7724 states to 7724 states and 26320 transitions. [2021-06-05 23:46:40,244 INFO L78 Accepts]: Start accepts. Automaton has 7724 states and 26320 transitions. Word has length 30 [2021-06-05 23:46:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:40,244 INFO L482 AbstractCegarLoop]: Abstraction has 7724 states and 26320 transitions. [2021-06-05 23:46:40,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 7724 states and 26320 transitions. [2021-06-05 23:46:40,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:40,254 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:40,254 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:40,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-06-05 23:46:40,455 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:40,455 INFO L82 PathProgramCache]: Analyzing trace with hash 861731688, now seen corresponding path program 131 times [2021-06-05 23:46:40,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:40,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413022148] [2021-06-05 23:46:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:41,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:41,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413022148] [2021-06-05 23:46:41,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413022148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:41,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042305450] [2021-06-05 23:46:41,063 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 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 [2021-06-05 23:46:41,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:46:41,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:41,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:46:41,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:41,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:41,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:41,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:46:41,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:41,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:41,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:41,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:46:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:41,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042305450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:41,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:41,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:46:41,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515049915] [2021-06-05 23:46:41,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:46:41,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:41,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:46:41,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:46:41,857 INFO L87 Difference]: Start difference. First operand 7724 states and 26320 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:43,061 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-05 23:46:43,497 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-06-05 23:46:44,281 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-06-05 23:46:44,827 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-06-05 23:46:45,666 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-06-05 23:46:46,818 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-06-05 23:46:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:47,492 INFO L93 Difference]: Finished difference Result 10471 states and 35019 transitions. [2021-06-05 23:46:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:46:47,493 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:47,509 INFO L225 Difference]: With dead ends: 10471 [2021-06-05 23:46:47,509 INFO L226 Difference]: Without dead ends: 10435 [2021-06-05 23:46:47,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 4246.8ms TimeCoverageRelationStatistics Valid=405, Invalid=2351, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:46:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-06-05 23:46:47,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 7741. [2021-06-05 23:46:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7741 states, 7740 states have (on average 3.4059431524547805) internal successors, (26362), 7740 states have internal predecessors, (26362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7741 states to 7741 states and 26362 transitions. [2021-06-05 23:46:47,640 INFO L78 Accepts]: Start accepts. Automaton has 7741 states and 26362 transitions. Word has length 30 [2021-06-05 23:46:47,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:47,640 INFO L482 AbstractCegarLoop]: Abstraction has 7741 states and 26362 transitions. [2021-06-05 23:46:47,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7741 states and 26362 transitions. [2021-06-05 23:46:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:47,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:47,650 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:47,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:47,851 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:47,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:47,851 INFO L82 PathProgramCache]: Analyzing trace with hash -806581072, now seen corresponding path program 132 times [2021-06-05 23:46:47,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:47,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840512162] [2021-06-05 23:46:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:48,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:48,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840512162] [2021-06-05 23:46:48,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840512162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:48,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477740997] [2021-06-05 23:46:48,610 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 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 [2021-06-05 23:46:48,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:46:48,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:48,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:46:48,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:49,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:49,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:49,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:46:49,130 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:49,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:49,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:49,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:46:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:49,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477740997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:49,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:49,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:46:49,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808147504] [2021-06-05 23:46:49,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:46:49,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:49,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:46:49,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:46:49,266 INFO L87 Difference]: Start difference. First operand 7741 states and 26362 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:50,138 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-06-05 23:46:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:52,826 INFO L93 Difference]: Finished difference Result 10347 states and 34526 transitions. [2021-06-05 23:46:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:46:52,826 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:52,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:52,842 INFO L225 Difference]: With dead ends: 10347 [2021-06-05 23:46:52,843 INFO L226 Difference]: Without dead ends: 10275 [2021-06-05 23:46:52,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 2643.9ms TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:46:52,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2021-06-05 23:46:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 7692. [2021-06-05 23:46:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 7691 states have (on average 3.4054089195163177) internal successors, (26191), 7691 states have internal predecessors, (26191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:52,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 26191 transitions. [2021-06-05 23:46:52,969 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 26191 transitions. Word has length 30 [2021-06-05 23:46:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:52,970 INFO L482 AbstractCegarLoop]: Abstraction has 7692 states and 26191 transitions. [2021-06-05 23:46:52,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:52,970 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 26191 transitions. [2021-06-05 23:46:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:52,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:52,979 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:53,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 23:46:53,180 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:53,180 INFO L82 PathProgramCache]: Analyzing trace with hash -697524088, now seen corresponding path program 133 times [2021-06-05 23:46:53,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:53,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277486166] [2021-06-05 23:46:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:53,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:53,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277486166] [2021-06-05 23:46:53,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277486166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:53,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578594476] [2021-06-05 23:46:53,815 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 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 [2021-06-05 23:46:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:53,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:46:53,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:54,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:54,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:54,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:46:54,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:54,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:54,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:54,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:46:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:54,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578594476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:54,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:54,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:46:54,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094471802] [2021-06-05 23:46:54,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:54,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:54,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:54,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:54,534 INFO L87 Difference]: Start difference. First operand 7692 states and 26191 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:54,749 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-06-05 23:46:54,939 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-05 23:46:55,297 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-06-05 23:46:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:56,974 INFO L93 Difference]: Finished difference Result 9596 states and 32348 transitions. [2021-06-05 23:46:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:46:56,974 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:46:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:56,990 INFO L225 Difference]: With dead ends: 9596 [2021-06-05 23:46:56,990 INFO L226 Difference]: Without dead ends: 9581 [2021-06-05 23:46:56,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2086.5ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:46:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9581 states. [2021-06-05 23:46:57,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 7697. [2021-06-05 23:46:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7696 states have (on average 3.4056652806652807) internal successors, (26210), 7696 states have internal predecessors, (26210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 26210 transitions. [2021-06-05 23:46:57,119 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 26210 transitions. Word has length 30 [2021-06-05 23:46:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:57,120 INFO L482 AbstractCegarLoop]: Abstraction has 7697 states and 26210 transitions. [2021-06-05 23:46:57,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 26210 transitions. [2021-06-05 23:46:57,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:46:57,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:57,131 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:57,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:57,332 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:57,332 INFO L82 PathProgramCache]: Analyzing trace with hash -951187922, now seen corresponding path program 134 times [2021-06-05 23:46:57,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:57,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622999740] [2021-06-05 23:46:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:57,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:57,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622999740] [2021-06-05 23:46:57,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622999740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:57,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532421065] [2021-06-05 23:46:57,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:46:57,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:46:57,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:57,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:46:57,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:58,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:58,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:58,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:46:58,554 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:58,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:58,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:58,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:46:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:58,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532421065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:58,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:58,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:46:58,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751337561] [2021-06-05 23:46:58,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:46:58,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:58,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:46:58,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:46:58,722 INFO L87 Difference]: Start difference. First operand 7697 states and 26210 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:58,940 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-06-05 23:46:59,130 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-05 23:46:59,470 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-06-05 23:47:00,800 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-06-05 23:47:01,046 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-06-05 23:47:02,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:02,093 INFO L93 Difference]: Finished difference Result 9964 states and 33540 transitions. [2021-06-05 23:47:02,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:47:02,093 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:02,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:02,108 INFO L225 Difference]: With dead ends: 9964 [2021-06-05 23:47:02,109 INFO L226 Difference]: Without dead ends: 9949 [2021-06-05 23:47:02,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2622.6ms TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:47:02,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9949 states. [2021-06-05 23:47:02,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9949 to 7694. [2021-06-05 23:47:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7694 states, 7693 states have (on average 3.4053035226829587) internal successors, (26197), 7693 states have internal predecessors, (26197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7694 states to 7694 states and 26197 transitions. [2021-06-05 23:47:02,235 INFO L78 Accepts]: Start accepts. Automaton has 7694 states and 26197 transitions. Word has length 30 [2021-06-05 23:47:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:02,235 INFO L482 AbstractCegarLoop]: Abstraction has 7694 states and 26197 transitions. [2021-06-05 23:47:02,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 7694 states and 26197 transitions. [2021-06-05 23:47:02,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:02,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:02,244 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:02,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-05 23:47:02,445 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:02,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1739005664, now seen corresponding path program 135 times [2021-06-05 23:47:02,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:02,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749325164] [2021-06-05 23:47:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:03,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:03,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749325164] [2021-06-05 23:47:03,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749325164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:03,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646954454] [2021-06-05 23:47:03,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:47:03,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:47:03,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:03,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:47:03,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:03,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:03,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:03,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:47:03,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:03,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:03,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:03,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-05 23:47:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:03,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646954454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:03,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:03,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:47:03,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289341441] [2021-06-05 23:47:03,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:47:03,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:03,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:47:03,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:47:03,882 INFO L87 Difference]: Start difference. First operand 7694 states and 26197 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:05,549 INFO L93 Difference]: Finished difference Result 9270 states and 31237 transitions. [2021-06-05 23:47:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:47:05,550 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:05,565 INFO L225 Difference]: With dead ends: 9270 [2021-06-05 23:47:05,566 INFO L226 Difference]: Without dead ends: 9255 [2021-06-05 23:47:05,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1536.3ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:47:05,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2021-06-05 23:47:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 7697. [2021-06-05 23:47:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7696 states have (on average 3.405535343035343) internal successors, (26209), 7696 states have internal predecessors, (26209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 26209 transitions. [2021-06-05 23:47:05,685 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 26209 transitions. Word has length 30 [2021-06-05 23:47:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:05,685 INFO L482 AbstractCegarLoop]: Abstraction has 7697 states and 26209 transitions. [2021-06-05 23:47:05,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 26209 transitions. [2021-06-05 23:47:05,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:05,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:05,695 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:05,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:05,896 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1234861006, now seen corresponding path program 136 times [2021-06-05 23:47:05,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:05,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014512406] [2021-06-05 23:47:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:06,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:06,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014512406] [2021-06-05 23:47:06,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014512406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:06,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546032565] [2021-06-05 23:47:06,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:47:06,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:47:06,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:06,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:47:06,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:07,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:07,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:07,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:47:07,175 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:07,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:07,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:07,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:47:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:07,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546032565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:07,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:07,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:47:07,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770243506] [2021-06-05 23:47:07,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:47:07,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:07,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:47:07,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:47:07,310 INFO L87 Difference]: Start difference. First operand 7697 states and 26209 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:09,204 INFO L93 Difference]: Finished difference Result 9829 states and 33022 transitions. [2021-06-05 23:47:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:47:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:09,220 INFO L225 Difference]: With dead ends: 9829 [2021-06-05 23:47:09,220 INFO L226 Difference]: Without dead ends: 9810 [2021-06-05 23:47:09,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1839.4ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:47:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-06-05 23:47:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 7693. [2021-06-05 23:47:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7693 states, 7692 states have (on average 3.40535621424857) internal successors, (26194), 7692 states have internal predecessors, (26194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7693 states to 7693 states and 26194 transitions. [2021-06-05 23:47:09,349 INFO L78 Accepts]: Start accepts. Automaton has 7693 states and 26194 transitions. Word has length 30 [2021-06-05 23:47:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:09,349 INFO L482 AbstractCegarLoop]: Abstraction has 7693 states and 26194 transitions. [2021-06-05 23:47:09,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 7693 states and 26194 transitions. [2021-06-05 23:47:09,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:09,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:09,359 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:09,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:09,560 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:09,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1901077732, now seen corresponding path program 137 times [2021-06-05 23:47:09,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:09,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173649665] [2021-06-05 23:47:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:10,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:10,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173649665] [2021-06-05 23:47:10,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173649665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:10,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204402189] [2021-06-05 23:47:10,204 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 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 [2021-06-05 23:47:10,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:47:10,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:10,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:47:10,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:10,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:10,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:10,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:47:10,778 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:10,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:10,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:10,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 23:47:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:10,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204402189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:10,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:10,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:47:10,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746878576] [2021-06-05 23:47:10,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:47:10,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:10,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:47:10,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:47:10,967 INFO L87 Difference]: Start difference. First operand 7693 states and 26194 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:12,073 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-05 23:47:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:13,776 INFO L93 Difference]: Finished difference Result 9812 states and 32964 transitions. [2021-06-05 23:47:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:47:13,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:13,792 INFO L225 Difference]: With dead ends: 9812 [2021-06-05 23:47:13,792 INFO L226 Difference]: Without dead ends: 9774 [2021-06-05 23:47:13,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2210.5ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:47:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9774 states. [2021-06-05 23:47:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 7691. [2021-06-05 23:47:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7691 states, 7690 states have (on average 3.4054616384915475) internal successors, (26188), 7690 states have internal predecessors, (26188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 26188 transitions. [2021-06-05 23:47:13,908 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 26188 transitions. Word has length 30 [2021-06-05 23:47:13,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:13,908 INFO L482 AbstractCegarLoop]: Abstraction has 7691 states and 26188 transitions. [2021-06-05 23:47:13,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:13,908 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 26188 transitions. [2021-06-05 23:47:13,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:13,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:13,918 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:14,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-05 23:47:14,118 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:14,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:14,119 INFO L82 PathProgramCache]: Analyzing trace with hash 78542928, now seen corresponding path program 138 times [2021-06-05 23:47:14,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:14,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166521818] [2021-06-05 23:47:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:14,562 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-06-05 23:47:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:14,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:14,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166521818] [2021-06-05 23:47:14,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166521818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:14,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267725205] [2021-06-05 23:47:14,794 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 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 [2021-06-05 23:47:14,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:47:14,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:14,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:47:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:15,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:15,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:15,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 23:47:15,272 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:15,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:15,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:15,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 23:47:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:15,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267725205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:15,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:15,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 23:47:15,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345538245] [2021-06-05 23:47:15,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:47:15,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:15,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:47:15,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:47:15,437 INFO L87 Difference]: Start difference. First operand 7691 states and 26188 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:17,361 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-06-05 23:47:17,585 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-05 23:47:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:19,630 INFO L93 Difference]: Finished difference Result 9869 states and 33063 transitions. [2021-06-05 23:47:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:47:19,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:19,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:19,646 INFO L225 Difference]: With dead ends: 9869 [2021-06-05 23:47:19,646 INFO L226 Difference]: Without dead ends: 9833 [2021-06-05 23:47:19,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 3011.4ms TimeCoverageRelationStatistics Valid=228, Invalid=1578, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:47:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9833 states. [2021-06-05 23:47:19,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9833 to 7688. [2021-06-05 23:47:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7688 states, 7687 states have (on average 3.4041888903343307) internal successors, (26168), 7687 states have internal predecessors, (26168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 26168 transitions. [2021-06-05 23:47:19,772 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 26168 transitions. Word has length 30 [2021-06-05 23:47:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:19,772 INFO L482 AbstractCegarLoop]: Abstraction has 7688 states and 26168 transitions. [2021-06-05 23:47:19,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 26168 transitions. [2021-06-05 23:47:19,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:19,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:19,782 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:19,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 23:47:19,985 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1358479268, now seen corresponding path program 139 times [2021-06-05 23:47:19,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:19,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161933629] [2021-06-05 23:47:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:20,431 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-06-05 23:47:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:20,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:20,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161933629] [2021-06-05 23:47:20,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161933629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:20,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552826845] [2021-06-05 23:47:20,684 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 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 [2021-06-05 23:47:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:20,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:47:20,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:21,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:21,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:21,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:47:21,267 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:21,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:21,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:21,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:47:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:21,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552826845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:21,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:21,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 23:47:21,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501459050] [2021-06-05 23:47:21,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:47:21,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:21,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:47:21,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:47:21,390 INFO L87 Difference]: Start difference. First operand 7688 states and 26168 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:23,571 INFO L93 Difference]: Finished difference Result 10287 states and 34404 transitions. [2021-06-05 23:47:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:47:23,572 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:23,589 INFO L225 Difference]: With dead ends: 10287 [2021-06-05 23:47:23,589 INFO L226 Difference]: Without dead ends: 10237 [2021-06-05 23:47:23,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1988.6ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:47:23,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10237 states. [2021-06-05 23:47:23,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10237 to 7690. [2021-06-05 23:47:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.404343867863181) internal successors, (26176), 7689 states have internal predecessors, (26176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 26176 transitions. [2021-06-05 23:47:23,724 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 26176 transitions. Word has length 30 [2021-06-05 23:47:23,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:23,724 INFO L482 AbstractCegarLoop]: Abstraction has 7690 states and 26176 transitions. [2021-06-05 23:47:23,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 26176 transitions. [2021-06-05 23:47:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:23,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:23,734 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:23,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 23:47:23,934 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:23,934 INFO L82 PathProgramCache]: Analyzing trace with hash -268655640, now seen corresponding path program 140 times [2021-06-05 23:47:23,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:23,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740155335] [2021-06-05 23:47:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:24,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:24,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740155335] [2021-06-05 23:47:24,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740155335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:24,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587959474] [2021-06-05 23:47:24,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:47:24,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:47:24,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:24,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:47:24,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:25,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:25,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:25,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:25,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 23:47:25,205 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:25,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:25,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:25,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 23:47:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:25,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587959474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:25,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:25,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:47:25,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914886393] [2021-06-05 23:47:25,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:47:25,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:25,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:47:25,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:47:25,397 INFO L87 Difference]: Start difference. First operand 7690 states and 26176 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:26,474 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-06-05 23:47:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:27,004 INFO L93 Difference]: Finished difference Result 9773 states and 32852 transitions. [2021-06-05 23:47:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:47:27,004 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:27,020 INFO L225 Difference]: With dead ends: 9773 [2021-06-05 23:47:27,021 INFO L226 Difference]: Without dead ends: 9749 [2021-06-05 23:47:27,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1668.2ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:47:27,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9749 states. [2021-06-05 23:47:27,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9749 to 7684. [2021-06-05 23:47:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7684 states, 7683 states have (on average 3.404139008199922) internal successors, (26154), 7683 states have internal predecessors, (26154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7684 states to 7684 states and 26154 transitions. [2021-06-05 23:47:27,144 INFO L78 Accepts]: Start accepts. Automaton has 7684 states and 26154 transitions. Word has length 30 [2021-06-05 23:47:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:27,144 INFO L482 AbstractCegarLoop]: Abstraction has 7684 states and 26154 transitions. [2021-06-05 23:47:27,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 7684 states and 26154 transitions. [2021-06-05 23:47:27,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:27,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:27,154 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:27,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:27,355 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1727704690, now seen corresponding path program 141 times [2021-06-05 23:47:27,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:27,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549925098] [2021-06-05 23:47:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:28,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:28,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549925098] [2021-06-05 23:47:28,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549925098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:28,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080813939] [2021-06-05 23:47:28,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:47:28,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:47:28,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:28,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:47:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:28,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:28,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:28,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:47:28,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:28,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:28,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:28,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-05 23:47:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:28,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080813939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:28,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:28,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:47:28,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666348267] [2021-06-05 23:47:28,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:47:28,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:28,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:47:28,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:47:28,814 INFO L87 Difference]: Start difference. First operand 7684 states and 26154 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:30,942 INFO L93 Difference]: Finished difference Result 9322 states and 31376 transitions. [2021-06-05 23:47:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:47:30,943 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:30,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:30,957 INFO L225 Difference]: With dead ends: 9322 [2021-06-05 23:47:30,957 INFO L226 Difference]: Without dead ends: 9307 [2021-06-05 23:47:30,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1715.0ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:47:30,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2021-06-05 23:47:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 7687. [2021-06-05 23:47:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7687 states, 7686 states have (on average 3.4043715846994536) internal successors, (26166), 7686 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7687 states to 7687 states and 26166 transitions. [2021-06-05 23:47:31,072 INFO L78 Accepts]: Start accepts. Automaton has 7687 states and 26166 transitions. Word has length 30 [2021-06-05 23:47:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:31,072 INFO L482 AbstractCegarLoop]: Abstraction has 7687 states and 26166 transitions. [2021-06-05 23:47:31,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 7687 states and 26166 transitions. [2021-06-05 23:47:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:31,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:31,082 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:31,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:31,283 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:31,283 INFO L82 PathProgramCache]: Analyzing trace with hash -491829020, now seen corresponding path program 142 times [2021-06-05 23:47:31,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:31,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236007754] [2021-06-05 23:47:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:32,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:32,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236007754] [2021-06-05 23:47:32,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236007754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:32,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369237039] [2021-06-05 23:47:32,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:47:32,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:47:32,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:32,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:47:32,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:32,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:32,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 23:47:32,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:32,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:32,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:32,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 23:47:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:32,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369237039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:32,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:32,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 23:47:32,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903632290] [2021-06-05 23:47:32,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:47:32,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:32,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:47:32,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:47:32,761 INFO L87 Difference]: Start difference. First operand 7687 states and 26166 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:35,714 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-06-05 23:47:36,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:36,086 INFO L93 Difference]: Finished difference Result 10068 states and 33705 transitions. [2021-06-05 23:47:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:47:36,087 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:36,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:36,104 INFO L225 Difference]: With dead ends: 10068 [2021-06-05 23:47:36,104 INFO L226 Difference]: Without dead ends: 10022 [2021-06-05 23:47:36,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 2567.4ms TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:47:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10022 states. [2021-06-05 23:47:36,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10022 to 7692. [2021-06-05 23:47:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 7691 states have (on average 3.4039786763749835) internal successors, (26180), 7691 states have internal predecessors, (26180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 26180 transitions. [2021-06-05 23:47:36,240 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 26180 transitions. Word has length 30 [2021-06-05 23:47:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:36,240 INFO L482 AbstractCegarLoop]: Abstraction has 7692 states and 26180 transitions. [2021-06-05 23:47:36,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 26180 transitions. [2021-06-05 23:47:36,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:36,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:36,251 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:36,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-05 23:47:36,451 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:36,452 INFO L82 PathProgramCache]: Analyzing trace with hash -245264536, now seen corresponding path program 143 times [2021-06-05 23:47:36,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:36,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672298888] [2021-06-05 23:47:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:37,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:37,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672298888] [2021-06-05 23:47:37,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672298888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:37,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121197675] [2021-06-05 23:47:37,103 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 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 [2021-06-05 23:47:37,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:47:37,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:37,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:47:37,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:37,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:37,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:37,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:37,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 23:47:37,802 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:37,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:37,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:37,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 23:47:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:38,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121197675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:38,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:38,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 23:47:38,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495700723] [2021-06-05 23:47:38,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:47:38,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:38,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:47:38,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:47:38,037 INFO L87 Difference]: Start difference. First operand 7692 states and 26180 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:39,874 INFO L93 Difference]: Finished difference Result 10182 states and 34192 transitions. [2021-06-05 23:47:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:47:39,874 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:39,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:39,891 INFO L225 Difference]: With dead ends: 10182 [2021-06-05 23:47:39,891 INFO L226 Difference]: Without dead ends: 10135 [2021-06-05 23:47:39,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1850.5ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:47:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10135 states. [2021-06-05 23:47:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10135 to 7690. [2021-06-05 23:47:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.403953700091039) internal successors, (26173), 7689 states have internal predecessors, (26173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:40,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 26173 transitions. [2021-06-05 23:47:40,021 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 26173 transitions. Word has length 30 [2021-06-05 23:47:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:40,021 INFO L482 AbstractCegarLoop]: Abstraction has 7690 states and 26173 transitions. [2021-06-05 23:47:40,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 26173 transitions. [2021-06-05 23:47:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:40,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:40,031 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:40,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-05 23:47:40,231 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:40,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:40,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1319108140, now seen corresponding path program 144 times [2021-06-05 23:47:40,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:40,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024947875] [2021-06-05 23:47:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:40,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:40,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024947875] [2021-06-05 23:47:40,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024947875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:40,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053660823] [2021-06-05 23:47:40,871 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 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 [2021-06-05 23:47:40,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:47:40,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:40,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:47:40,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 23:47:41,377 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:41,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:41,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 23:47:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:41,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053660823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:41,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:41,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:47:41,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352826327] [2021-06-05 23:47:41,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:47:41,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:41,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:47:41,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:47:41,592 INFO L87 Difference]: Start difference. First operand 7690 states and 26173 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:43,327 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-06-05 23:47:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:45,071 INFO L93 Difference]: Finished difference Result 9796 states and 32963 transitions. [2021-06-05 23:47:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:47:45,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:45,087 INFO L225 Difference]: With dead ends: 9796 [2021-06-05 23:47:45,087 INFO L226 Difference]: Without dead ends: 9761 [2021-06-05 23:47:45,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 3096.2ms TimeCoverageRelationStatistics Valid=304, Invalid=1766, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:47:45,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9761 states. [2021-06-05 23:47:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9761 to 7708. [2021-06-05 23:47:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7708 states, 7707 states have (on average 3.40352925911509) internal successors, (26231), 7707 states have internal predecessors, (26231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7708 states to 7708 states and 26231 transitions. [2021-06-05 23:47:45,213 INFO L78 Accepts]: Start accepts. Automaton has 7708 states and 26231 transitions. Word has length 30 [2021-06-05 23:47:45,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:45,214 INFO L482 AbstractCegarLoop]: Abstraction has 7708 states and 26231 transitions. [2021-06-05 23:47:45,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:45,214 INFO L276 IsEmpty]: Start isEmpty. Operand 7708 states and 26231 transitions. [2021-06-05 23:47:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:45,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:45,223 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:45,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:45,437 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:45,437 INFO L82 PathProgramCache]: Analyzing trace with hash -331160296, now seen corresponding path program 145 times [2021-06-05 23:47:45,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:45,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538910546] [2021-06-05 23:47:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:46,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:46,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538910546] [2021-06-05 23:47:46,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538910546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:46,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634022627] [2021-06-05 23:47:46,056 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 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 [2021-06-05 23:47:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:46,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:47:46,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:46,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:46,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:47:46,577 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:46,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:46,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:46,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 23:47:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:46,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634022627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:46,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:46,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 23:47:46,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184317752] [2021-06-05 23:47:46,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:47:46,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:46,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:47:46,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:47:46,811 INFO L87 Difference]: Start difference. First operand 7708 states and 26231 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:48,166 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-05 23:47:49,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:49,818 INFO L93 Difference]: Finished difference Result 9863 states and 33168 transitions. [2021-06-05 23:47:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:47:49,818 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:49,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:49,834 INFO L225 Difference]: With dead ends: 9863 [2021-06-05 23:47:49,835 INFO L226 Difference]: Without dead ends: 9828 [2021-06-05 23:47:49,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 2001.2ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:47:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9828 states. [2021-06-05 23:47:49,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9828 to 7722. [2021-06-05 23:47:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7722 states, 7721 states have (on average 3.4030565988861547) internal successors, (26275), 7721 states have internal predecessors, (26275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7722 states to 7722 states and 26275 transitions. [2021-06-05 23:47:49,957 INFO L78 Accepts]: Start accepts. Automaton has 7722 states and 26275 transitions. Word has length 30 [2021-06-05 23:47:49,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:49,957 INFO L482 AbstractCegarLoop]: Abstraction has 7722 states and 26275 transitions. [2021-06-05 23:47:49,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:49,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7722 states and 26275 transitions. [2021-06-05 23:47:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:49,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:49,967 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:50,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 23:47:50,167 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:50,168 INFO L82 PathProgramCache]: Analyzing trace with hash -276295984, now seen corresponding path program 146 times [2021-06-05 23:47:50,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:50,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188445926] [2021-06-05 23:47:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:50,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:50,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188445926] [2021-06-05 23:47:50,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188445926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:50,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476153047] [2021-06-05 23:47:50,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:47:50,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:47:50,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:50,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:47:50,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:51,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:51,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:51,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:47:51,300 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:51,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:51,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:51,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:47:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:51,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476153047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:51,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:51,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 23:47:51,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793224930] [2021-06-05 23:47:51,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:47:51,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:47:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:47:51,509 INFO L87 Difference]: Start difference. First operand 7722 states and 26275 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:54,736 INFO L93 Difference]: Finished difference Result 10221 states and 34332 transitions. [2021-06-05 23:47:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:47:54,736 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:47:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:54,755 INFO L225 Difference]: With dead ends: 10221 [2021-06-05 23:47:54,755 INFO L226 Difference]: Without dead ends: 10142 [2021-06-05 23:47:54,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 2629.5ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:47:54,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2021-06-05 23:47:54,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 7745. [2021-06-05 23:47:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7745 states, 7744 states have (on average 3.4021177685950414) internal successors, (26346), 7744 states have internal predecessors, (26346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7745 states to 7745 states and 26346 transitions. [2021-06-05 23:47:54,901 INFO L78 Accepts]: Start accepts. Automaton has 7745 states and 26346 transitions. Word has length 30 [2021-06-05 23:47:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:54,901 INFO L482 AbstractCegarLoop]: Abstraction has 7745 states and 26346 transitions. [2021-06-05 23:47:54,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 7745 states and 26346 transitions. [2021-06-05 23:47:54,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:47:54,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:54,913 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:55,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:55,113 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:55,113 INFO L82 PathProgramCache]: Analyzing trace with hash -781961368, now seen corresponding path program 147 times [2021-06-05 23:47:55,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:55,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047639262] [2021-06-05 23:47:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:55,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:55,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047639262] [2021-06-05 23:47:55,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047639262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:55,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287565952] [2021-06-05 23:47:55,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:47:55,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:47:55,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:55,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:47:55,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:56,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:56,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 23:47:56,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:56,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:56,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:56,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:282 [2021-06-05 23:47:57,070 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 23:47:57,789 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 23:47:58,123 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-06-05 23:47:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:58,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287565952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:58,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:58,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 23:47:58,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913695174] [2021-06-05 23:47:58,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:47:58,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:58,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:47:58,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:47:58,178 INFO L87 Difference]: Start difference. First operand 7745 states and 26346 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:59,188 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 19 [2021-06-05 23:48:00,111 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2021-06-05 23:48:01,037 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 22 [2021-06-05 23:48:01,650 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 25 [2021-06-05 23:48:01,943 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 26 [2021-06-05 23:48:02,263 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-06-05 23:48:03,307 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2021-06-05 23:48:03,535 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-06-05 23:48:03,821 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2021-06-05 23:48:04,066 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2021-06-05 23:48:04,473 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2021-06-05 23:48:05,017 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 23 [2021-06-05 23:48:05,486 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 32 [2021-06-05 23:48:06,608 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 23:48:06,876 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2021-06-05 23:48:07,733 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-06-05 23:48:08,158 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-06-05 23:48:08,530 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-06-05 23:48:09,105 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-06-05 23:48:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:09,739 INFO L93 Difference]: Finished difference Result 11812 states and 39325 transitions. [2021-06-05 23:48:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:48:09,739 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:09,758 INFO L225 Difference]: With dead ends: 11812 [2021-06-05 23:48:09,758 INFO L226 Difference]: Without dead ends: 11727 [2021-06-05 23:48:09,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 10077.5ms TimeCoverageRelationStatistics Valid=427, Invalid=2879, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:48:09,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11727 states. [2021-06-05 23:48:09,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11727 to 7810. [2021-06-05 23:48:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7810 states, 7809 states have (on average 3.4061979766935586) internal successors, (26599), 7809 states have internal predecessors, (26599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7810 states to 7810 states and 26599 transitions. [2021-06-05 23:48:09,886 INFO L78 Accepts]: Start accepts. Automaton has 7810 states and 26599 transitions. Word has length 30 [2021-06-05 23:48:09,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:09,886 INFO L482 AbstractCegarLoop]: Abstraction has 7810 states and 26599 transitions. [2021-06-05 23:48:09,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:09,886 INFO L276 IsEmpty]: Start isEmpty. Operand 7810 states and 26599 transitions. [2021-06-05 23:48:09,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:09,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:09,895 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:10,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:10,096 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:10,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:10,096 INFO L82 PathProgramCache]: Analyzing trace with hash 788028937, now seen corresponding path program 50 times [2021-06-05 23:48:10,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:10,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967391437] [2021-06-05 23:48:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:10,340 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-05 23:48:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:11,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:11,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967391437] [2021-06-05 23:48:11,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967391437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:11,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823399705] [2021-06-05 23:48:11,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-06-05 23:48:11,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:48:11,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:11,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:48:11,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:11,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:11,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:11,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:11,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 23:48:11,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:11,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:11,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:11,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-05 23:48:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:11,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823399705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:11,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:11,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 23:48:11,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297623817] [2021-06-05 23:48:11,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:48:11,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:11,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:48:11,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:48:11,660 INFO L87 Difference]: Start difference. First operand 7810 states and 26599 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:13,836 INFO L93 Difference]: Finished difference Result 9430 states and 31554 transitions. [2021-06-05 23:48:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:48:13,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:13,851 INFO L225 Difference]: With dead ends: 9430 [2021-06-05 23:48:13,852 INFO L226 Difference]: Without dead ends: 9404 [2021-06-05 23:48:13,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2420.4ms TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:48:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9404 states. [2021-06-05 23:48:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9404 to 7836. [2021-06-05 23:48:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.4031908104658584) internal successors, (26664), 7835 states have internal predecessors, (26664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 26664 transitions. [2021-06-05 23:48:14,008 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 26664 transitions. Word has length 30 [2021-06-05 23:48:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:14,008 INFO L482 AbstractCegarLoop]: Abstraction has 7836 states and 26664 transitions. [2021-06-05 23:48:14,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 26664 transitions. [2021-06-05 23:48:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:14,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:14,019 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:14,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 23:48:14,219 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:14,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:14,219 INFO L82 PathProgramCache]: Analyzing trace with hash 50056363, now seen corresponding path program 51 times [2021-06-05 23:48:14,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:14,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512690643] [2021-06-05 23:48:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:14,435 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-05 23:48:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:15,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:15,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512690643] [2021-06-05 23:48:15,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512690643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:15,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601633023] [2021-06-05 23:48:15,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:48:15,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:48:15,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:15,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:48:15,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:15,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:15,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:15,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:15,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:15,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:48:15,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:15,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:15,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:15,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:48:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:15,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601633023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:15,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:15,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 23:48:15,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530610991] [2021-06-05 23:48:15,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:48:15,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:15,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:48:15,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:48:15,936 INFO L87 Difference]: Start difference. First operand 7836 states and 26664 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:16,521 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-06-05 23:48:17,398 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-06-05 23:48:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:21,464 INFO L93 Difference]: Finished difference Result 9653 states and 32165 transitions. [2021-06-05 23:48:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:48:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:21,480 INFO L225 Difference]: With dead ends: 9653 [2021-06-05 23:48:21,480 INFO L226 Difference]: Without dead ends: 9638 [2021-06-05 23:48:21,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 3832.1ms TimeCoverageRelationStatistics Valid=317, Invalid=2335, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:48:21,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9638 states. [2021-06-05 23:48:21,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9638 to 7836. [2021-06-05 23:48:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.4031908104658584) internal successors, (26664), 7835 states have internal predecessors, (26664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 26664 transitions. [2021-06-05 23:48:21,602 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 26664 transitions. Word has length 30 [2021-06-05 23:48:21,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:21,602 INFO L482 AbstractCegarLoop]: Abstraction has 7836 states and 26664 transitions. [2021-06-05 23:48:21,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 26664 transitions. [2021-06-05 23:48:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:21,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:21,612 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:21,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:21,817 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:21,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:21,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1431852029, now seen corresponding path program 52 times [2021-06-05 23:48:21,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:21,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146514831] [2021-06-05 23:48:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:22,093 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-05 23:48:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:22,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:22,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146514831] [2021-06-05 23:48:22,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146514831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:22,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286900968] [2021-06-05 23:48:22,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:48:22,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:48:22,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:22,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:48:22,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:23,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:23,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:23,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:23,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:23,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 23:48:23,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:23,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:23,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:23,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-05 23:48:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:23,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286900968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:23,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:23,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 23:48:23,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998998227] [2021-06-05 23:48:23,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:48:23,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:23,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:48:23,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:48:23,344 INFO L87 Difference]: Start difference. First operand 7836 states and 26664 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:24,945 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-06-05 23:48:25,439 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-06-05 23:48:26,651 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-05 23:48:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:26,982 INFO L93 Difference]: Finished difference Result 9381 states and 31423 transitions. [2021-06-05 23:48:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:48:26,983 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:26,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:26,997 INFO L225 Difference]: With dead ends: 9381 [2021-06-05 23:48:26,997 INFO L226 Difference]: Without dead ends: 9355 [2021-06-05 23:48:26,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 3418.0ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:48:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9355 states. [2021-06-05 23:48:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9355 to 7848. [2021-06-05 23:48:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 3.401809608767682) internal successors, (26694), 7847 states have internal predecessors, (26694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 26694 transitions. [2021-06-05 23:48:27,119 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 26694 transitions. Word has length 30 [2021-06-05 23:48:27,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:27,120 INFO L482 AbstractCegarLoop]: Abstraction has 7848 states and 26694 transitions. [2021-06-05 23:48:27,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 26694 transitions. [2021-06-05 23:48:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:27,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:27,129 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:27,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:27,341 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:27,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1082463897, now seen corresponding path program 53 times [2021-06-05 23:48:27,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:27,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927764267] [2021-06-05 23:48:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:27,632 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-05 23:48:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:28,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:28,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927764267] [2021-06-05 23:48:28,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927764267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:28,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793721511] [2021-06-05 23:48:28,374 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 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 [2021-06-05 23:48:28,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:48:28,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:28,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:48:28,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:28,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:28,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:28,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:28,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:28,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 23:48:28,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:28,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:28,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:28,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-05 23:48:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:28,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793721511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:28,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:28,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 23:48:28,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61628813] [2021-06-05 23:48:28,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:48:28,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:28,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:48:28,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:48:28,891 INFO L87 Difference]: Start difference. First operand 7848 states and 26694 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:30,920 INFO L93 Difference]: Finished difference Result 9369 states and 31402 transitions. [2021-06-05 23:48:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:48:30,920 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:30,934 INFO L225 Difference]: With dead ends: 9369 [2021-06-05 23:48:30,934 INFO L226 Difference]: Without dead ends: 9354 [2021-06-05 23:48:30,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2502.0ms TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:48:30,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9354 states. [2021-06-05 23:48:31,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9354 to 7848. [2021-06-05 23:48:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 3.401809608767682) internal successors, (26694), 7847 states have internal predecessors, (26694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:31,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 26694 transitions. [2021-06-05 23:48:31,050 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 26694 transitions. Word has length 30 [2021-06-05 23:48:31,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:31,050 INFO L482 AbstractCegarLoop]: Abstraction has 7848 states and 26694 transitions. [2021-06-05 23:48:31,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:31,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 26694 transitions. [2021-06-05 23:48:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:31,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:31,060 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:31,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-06-05 23:48:31,265 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash 704274543, now seen corresponding path program 54 times [2021-06-05 23:48:31,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:31,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714574803] [2021-06-05 23:48:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:31,552 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-06-05 23:48:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:32,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:32,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714574803] [2021-06-05 23:48:32,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714574803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:32,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530633043] [2021-06-05 23:48:32,047 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 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 [2021-06-05 23:48:32,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:48:32,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:48:32,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:32,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:32,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:32,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:32,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:32,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:48:32,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:32,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:32,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:32,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:48:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:32,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530633043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:32,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:32,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 23:48:32,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517812200] [2021-06-05 23:48:32,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:48:32,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:32,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:48:32,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:48:32,673 INFO L87 Difference]: Start difference. First operand 7848 states and 26694 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:33,765 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-06-05 23:48:34,011 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-06-05 23:48:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:35,999 INFO L93 Difference]: Finished difference Result 9087 states and 30043 transitions. [2021-06-05 23:48:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:48:35,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:35,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:36,014 INFO L225 Difference]: With dead ends: 9087 [2021-06-05 23:48:36,014 INFO L226 Difference]: Without dead ends: 9057 [2021-06-05 23:48:36,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 3267.4ms TimeCoverageRelationStatistics Valid=438, Invalid=2112, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:48:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9057 states. [2021-06-05 23:48:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9057 to 7888. [2021-06-05 23:48:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7888 states, 7887 states have (on average 3.398250285279574) internal successors, (26802), 7887 states have internal predecessors, (26802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7888 states to 7888 states and 26802 transitions. [2021-06-05 23:48:36,148 INFO L78 Accepts]: Start accepts. Automaton has 7888 states and 26802 transitions. Word has length 30 [2021-06-05 23:48:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:36,148 INFO L482 AbstractCegarLoop]: Abstraction has 7888 states and 26802 transitions. [2021-06-05 23:48:36,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7888 states and 26802 transitions. [2021-06-05 23:48:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:36,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:36,158 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:36,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:36,359 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:36,359 INFO L82 PathProgramCache]: Analyzing trace with hash 742037125, now seen corresponding path program 55 times [2021-06-05 23:48:36,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:36,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287914475] [2021-06-05 23:48:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:36,656 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-06-05 23:48:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:37,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:37,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287914475] [2021-06-05 23:48:37,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287914475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:37,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851804222] [2021-06-05 23:48:37,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:48:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:37,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:48:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:37,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:37,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:37,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:37,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:37,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:48:37,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:37,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:37,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:37,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:48:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:37,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851804222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:37,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:37,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:48:37,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373727262] [2021-06-05 23:48:37,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:48:37,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:37,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:48:37,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:48:37,963 INFO L87 Difference]: Start difference. First operand 7888 states and 26802 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:38,848 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-05 23:48:41,832 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-06-05 23:48:42,061 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-06-05 23:48:42,485 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-06-05 23:48:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:42,773 INFO L93 Difference]: Finished difference Result 9802 states and 32822 transitions. [2021-06-05 23:48:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:48:42,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:42,788 INFO L225 Difference]: With dead ends: 9802 [2021-06-05 23:48:42,788 INFO L226 Difference]: Without dead ends: 9740 [2021-06-05 23:48:42,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 4384.7ms TimeCoverageRelationStatistics Valid=576, Invalid=2964, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:48:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9740 states. [2021-06-05 23:48:42,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9740 to 7900. [2021-06-05 23:48:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 3.396885681731865) internal successors, (26832), 7899 states have internal predecessors, (26832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 26832 transitions. [2021-06-05 23:48:42,904 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 26832 transitions. Word has length 30 [2021-06-05 23:48:42,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:42,904 INFO L482 AbstractCegarLoop]: Abstraction has 7900 states and 26832 transitions. [2021-06-05 23:48:42,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:42,904 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 26832 transitions. [2021-06-05 23:48:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:42,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:42,914 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:43,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:43,114 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1402383373, now seen corresponding path program 56 times [2021-06-05 23:48:43,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:43,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9347832] [2021-06-05 23:48:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:43,397 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-06-05 23:48:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:43,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:43,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9347832] [2021-06-05 23:48:43,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9347832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:43,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786397819] [2021-06-05 23:48:43,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:48:43,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:48:43,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:43,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:48:43,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:44,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:44,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:44,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:44,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:44,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:48:44,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:44,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:44,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:44,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 23:48:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:44,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786397819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:44,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:44,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:48:44,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075511821] [2021-06-05 23:48:44,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:48:44,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:44,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:48:44,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:48:44,500 INFO L87 Difference]: Start difference. First operand 7900 states and 26832 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:47,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:47,945 INFO L93 Difference]: Finished difference Result 9832 states and 32876 transitions. [2021-06-05 23:48:47,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:48:47,946 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:47,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:47,961 INFO L225 Difference]: With dead ends: 9832 [2021-06-05 23:48:47,961 INFO L226 Difference]: Without dead ends: 9778 [2021-06-05 23:48:47,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 3003.8ms TimeCoverageRelationStatistics Valid=404, Invalid=2046, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:48:47,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-06-05 23:48:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 7906. [2021-06-05 23:48:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7906 states, 7905 states have (on average 3.3964579380139153) internal successors, (26849), 7905 states have internal predecessors, (26849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7906 states to 7906 states and 26849 transitions. [2021-06-05 23:48:48,082 INFO L78 Accepts]: Start accepts. Automaton has 7906 states and 26849 transitions. Word has length 30 [2021-06-05 23:48:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:48,082 INFO L482 AbstractCegarLoop]: Abstraction has 7906 states and 26849 transitions. [2021-06-05 23:48:48,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 7906 states and 26849 transitions. [2021-06-05 23:48:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:48,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:48,092 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:48,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:48,293 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash -754295013, now seen corresponding path program 57 times [2021-06-05 23:48:48,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:48,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842262909] [2021-06-05 23:48:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:48,533 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-05 23:48:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:49,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:49,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842262909] [2021-06-05 23:48:49,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842262909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:49,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936030746] [2021-06-05 23:48:49,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 23:48:49,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:48:49,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:49,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:48:49,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:49,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:49,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:49,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:49,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:49,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 23:48:49,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:49,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:49,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:49,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-06-05 23:48:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:50,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936030746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:50,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:50,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 23:48:50,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385598975] [2021-06-05 23:48:50,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:48:50,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:50,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:48:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:48:50,159 INFO L87 Difference]: Start difference. First operand 7906 states and 26849 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:51,078 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-06-05 23:48:51,581 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-06-05 23:48:54,207 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-06-05 23:48:55,218 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-06-05 23:48:56,633 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-06-05 23:48:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:57,336 INFO L93 Difference]: Finished difference Result 9776 states and 32529 transitions. [2021-06-05 23:48:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:48:57,337 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:48:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:57,353 INFO L225 Difference]: With dead ends: 9776 [2021-06-05 23:48:57,354 INFO L226 Difference]: Without dead ends: 9693 [2021-06-05 23:48:57,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 5131.1ms TimeCoverageRelationStatistics Valid=484, Invalid=3806, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:48:57,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9693 states. [2021-06-05 23:48:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9693 to 7982. [2021-06-05 23:48:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7982 states, 7981 states have (on average 3.3914296454078436) internal successors, (27067), 7981 states have internal predecessors, (27067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7982 states to 7982 states and 27067 transitions. [2021-06-05 23:48:57,484 INFO L78 Accepts]: Start accepts. Automaton has 7982 states and 27067 transitions. Word has length 30 [2021-06-05 23:48:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:57,484 INFO L482 AbstractCegarLoop]: Abstraction has 7982 states and 27067 transitions. [2021-06-05 23:48:57,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 7982 states and 27067 transitions. [2021-06-05 23:48:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:48:57,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:57,494 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:57,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 23:48:57,695 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash -716532431, now seen corresponding path program 58 times [2021-06-05 23:48:57,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:57,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431190203] [2021-06-05 23:48:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:57,938 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-06-05 23:48:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:58,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:58,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431190203] [2021-06-05 23:48:58,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431190203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:58,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321395911] [2021-06-05 23:48:58,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:48:58,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:48:58,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:58,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:48:58,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:59,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:59,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:59,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:59,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:59,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 23:48:59,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:59,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:59,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:59,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-05 23:48:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:59,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321395911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:59,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:59,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 23:48:59,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050720440] [2021-06-05 23:48:59,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:48:59,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:59,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:48:59,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:48:59,109 INFO L87 Difference]: Start difference. First operand 7982 states and 27067 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:59,626 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-06-05 23:48:59,992 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-06-05 23:49:02,061 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-06-05 23:49:02,312 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 23:49:02,572 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-06-05 23:49:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:02,771 INFO L93 Difference]: Finished difference Result 9883 states and 33050 transitions. [2021-06-05 23:49:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:49:02,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:02,788 INFO L225 Difference]: With dead ends: 9883 [2021-06-05 23:49:02,788 INFO L226 Difference]: Without dead ends: 9857 [2021-06-05 23:49:02,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3555.3ms TimeCoverageRelationStatistics Valid=420, Invalid=1932, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:49:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9857 states. [2021-06-05 23:49:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9857 to 7986. [2021-06-05 23:49:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7986 states, 7985 states have (on average 3.3909830932999374) internal successors, (27077), 7985 states have internal predecessors, (27077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7986 states to 7986 states and 27077 transitions. [2021-06-05 23:49:02,926 INFO L78 Accepts]: Start accepts. Automaton has 7986 states and 27077 transitions. Word has length 30 [2021-06-05 23:49:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:02,926 INFO L482 AbstractCegarLoop]: Abstraction has 7986 states and 27077 transitions. [2021-06-05 23:49:02,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:02,926 INFO L276 IsEmpty]: Start isEmpty. Operand 7986 states and 27077 transitions. [2021-06-05 23:49:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:02,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:02,938 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:03,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:03,141 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:03,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:03,141 INFO L82 PathProgramCache]: Analyzing trace with hash -953383713, now seen corresponding path program 59 times [2021-06-05 23:49:03,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:03,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032497397] [2021-06-05 23:49:03,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:03,360 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-05 23:49:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:04,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:04,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032497397] [2021-06-05 23:49:04,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032497397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:04,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029068639] [2021-06-05 23:49:04,095 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 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 [2021-06-05 23:49:04,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:49:04,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:04,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:49:04,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:04,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:04,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:04,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:04,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 23:49:04,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:04,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:04,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:04,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-05 23:49:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:04,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029068639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:04,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:04,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 23:49:04,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390714523] [2021-06-05 23:49:04,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:04,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:04,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:04,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:04,668 INFO L87 Difference]: Start difference. First operand 7986 states and 27077 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:05,745 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-06-05 23:49:06,667 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-05 23:49:07,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:07,074 INFO L93 Difference]: Finished difference Result 9410 states and 31546 transitions. [2021-06-05 23:49:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:49:07,074 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:07,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:07,093 INFO L225 Difference]: With dead ends: 9410 [2021-06-05 23:49:07,093 INFO L226 Difference]: Without dead ends: 9384 [2021-06-05 23:49:07,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2810.7ms TimeCoverageRelationStatistics Valid=287, Invalid=1353, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:49:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9384 states. [2021-06-05 23:49:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9384 to 7986. [2021-06-05 23:49:07,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7986 states, 7985 states have (on average 3.3909830932999374) internal successors, (27077), 7985 states have internal predecessors, (27077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7986 states to 7986 states and 27077 transitions. [2021-06-05 23:49:07,231 INFO L78 Accepts]: Start accepts. Automaton has 7986 states and 27077 transitions. Word has length 30 [2021-06-05 23:49:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:07,232 INFO L482 AbstractCegarLoop]: Abstraction has 7986 states and 27077 transitions. [2021-06-05 23:49:07,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 7986 states and 27077 transitions. [2021-06-05 23:49:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:07,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:07,243 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:07,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-06-05 23:49:07,443 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:07,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:07,444 INFO L82 PathProgramCache]: Analyzing trace with hash -664551470, now seen corresponding path program 148 times [2021-06-05 23:49:07,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:07,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981469211] [2021-06-05 23:49:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:07,887 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-06-05 23:49:08,227 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-06-05 23:49:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:08,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:08,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981469211] [2021-06-05 23:49:08,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981469211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:08,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651714911] [2021-06-05 23:49:08,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-06-05 23:49:08,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:08,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:08,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:49:08,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:08,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:08,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:08,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:49:08,879 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:08,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:08,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:08,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 23:49:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:09,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651714911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:09,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:09,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:49:09,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560732587] [2021-06-05 23:49:09,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:49:09,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:09,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:49:09,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:49:09,036 INFO L87 Difference]: Start difference. First operand 7986 states and 27077 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:10,143 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-06-05 23:49:10,541 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-05 23:49:10,790 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-06-05 23:49:11,119 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-06-05 23:49:11,328 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-05 23:49:12,505 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-06-05 23:49:12,696 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-06-05 23:49:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:13,445 INFO L93 Difference]: Finished difference Result 10995 states and 36694 transitions. [2021-06-05 23:49:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:49:13,445 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:13,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:13,463 INFO L225 Difference]: With dead ends: 10995 [2021-06-05 23:49:13,463 INFO L226 Difference]: Without dead ends: 10970 [2021-06-05 23:49:13,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 3494.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:49:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10970 states. [2021-06-05 23:49:13,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10970 to 8000. [2021-06-05 23:49:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8000 states, 7999 states have (on average 3.3905488186023254) internal successors, (27121), 7999 states have internal predecessors, (27121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8000 states to 8000 states and 27121 transitions. [2021-06-05 23:49:13,603 INFO L78 Accepts]: Start accepts. Automaton has 8000 states and 27121 transitions. Word has length 30 [2021-06-05 23:49:13,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:13,603 INFO L482 AbstractCegarLoop]: Abstraction has 8000 states and 27121 transitions. [2021-06-05 23:49:13,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:13,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8000 states and 27121 transitions. [2021-06-05 23:49:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:13,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:13,613 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:13,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 23:49:13,814 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:13,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:13,814 INFO L82 PathProgramCache]: Analyzing trace with hash 853941454, now seen corresponding path program 149 times [2021-06-05 23:49:13,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:13,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234668936] [2021-06-05 23:49:13,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:14,189 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-05 23:49:14,315 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-06-05 23:49:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:14,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:14,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234668936] [2021-06-05 23:49:14,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234668936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:14,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578131659] [2021-06-05 23:49:14,830 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 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 [2021-06-05 23:49:14,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:49:14,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:14,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:49:14,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:15,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:15,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:15,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 23:49:15,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:49:15,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:15,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-06-05 23:49:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:15,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578131659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:15,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:15,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2021-06-05 23:49:15,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755229187] [2021-06-05 23:49:15,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:49:15,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:15,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:49:15,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:49:15,425 INFO L87 Difference]: Start difference. First operand 8000 states and 27121 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:16,162 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-06-05 23:49:16,743 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-06-05 23:49:18,175 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-06-05 23:49:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:18,673 INFO L93 Difference]: Finished difference Result 10084 states and 33776 transitions. [2021-06-05 23:49:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:49:18,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:49:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:18,690 INFO L225 Difference]: With dead ends: 10084 [2021-06-05 23:49:18,691 INFO L226 Difference]: Without dead ends: 10059 [2021-06-05 23:49:18,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2675.1ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:49:18,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10059 states. [2021-06-05 23:49:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10059 to 7998. [2021-06-05 23:49:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7998 states, 7997 states have (on average 3.3905214455420785) internal successors, (27114), 7997 states have internal predecessors, (27114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7998 states to 7998 states and 27114 transitions. [2021-06-05 23:49:18,827 INFO L78 Accepts]: Start accepts. Automaton has 7998 states and 27114 transitions. Word has length 30 [2021-06-05 23:49:18,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:18,827 INFO L482 AbstractCegarLoop]: Abstraction has 7998 states and 27114 transitions. [2021-06-05 23:49:18,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 7998 states and 27114 transitions. [2021-06-05 23:49:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:49:18,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:18,837 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:19,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:19,037 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:19,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:19,038 INFO L82 PathProgramCache]: Analyzing trace with hash 251753802, now seen corresponding path program 150 times [2021-06-05 23:49:19,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:19,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333910453] [2021-06-05 23:49:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:19,425 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-05 23:49:19,624 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-06-05 23:49:19,754 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-05 23:49:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:19,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:19,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333910453] [2021-06-05 23:49:19,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333910453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:19,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21433347] [2021-06-05 23:49:19,991 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 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 [2021-06-05 23:49:20,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:49:20,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:20,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:49:20,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:20,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:20,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:20,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 23:49:20,473 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:20,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:20,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:20,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 23:49:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:20,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21433347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:20,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:20,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 23:49:20,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187287202] [2021-06-05 23:49:20,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:49:20,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:20,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:49:20,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:20,615 INFO L87 Difference]: Start difference. First operand 7998 states and 27114 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:21,362 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-06-05 23:49:22,687 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-06-05 23:49:23,015 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-06-05 23:49:23,369 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-06-05 23:49:23,794 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-05 23:49:24,362 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-06-05 23:49:24,788 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 Received shutdown request... [2021-06-05 23:49:25,087 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-06-05 23:49:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:49:25,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 23:49:25,288 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:49:25,290 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:49:25,291 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:49:25,291 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:49:25 BasicIcfg [2021-06-05 23:49:25,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:49:25,292 INFO L168 Benchmark]: Toolchain (without parser) took 783357.32 ms. Allocated memory was 346.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 325.5 MB in the beginning and 1.1 GB in the end (delta: -726.5 MB). Peak memory consumption was 440.5 MB. Max. memory is 16.0 GB. [2021-06-05 23:49:25,292 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 346.0 MB. Free memory is still 326.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:49:25,292 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.63 ms. Allocated memory is still 346.0 MB. Free memory was 325.3 MB in the beginning and 323.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:49:25,292 INFO L168 Benchmark]: Boogie Preprocessor took 20.33 ms. Allocated memory is still 346.0 MB. Free memory was 323.9 MB in the beginning and 323.0 MB in the end (delta: 888.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:49:25,292 INFO L168 Benchmark]: RCFGBuilder took 248.35 ms. Allocated memory is still 346.0 MB. Free memory was 322.8 MB in the beginning and 311.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 23:49:25,292 INFO L168 Benchmark]: TraceAbstraction took 783050.83 ms. Allocated memory was 346.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 311.1 MB in the beginning and 1.1 GB in the end (delta: -740.9 MB). Peak memory consumption was 425.8 MB. Max. memory is 16.0 GB. [2021-06-05 23:49:25,292 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 0.14 ms. Allocated memory is still 346.0 MB. Free memory is still 326.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 32.63 ms. Allocated memory is still 346.0 MB. Free memory was 325.3 MB in the beginning and 323.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.33 ms. Allocated memory is still 346.0 MB. Free memory was 323.9 MB in the beginning and 323.0 MB in the end (delta: 888.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 248.35 ms. Allocated memory is still 346.0 MB. Free memory was 322.8 MB in the beginning and 311.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 783050.83 ms. Allocated memory was 346.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 311.1 MB in the beginning and 1.1 GB in the end (delta: -740.9 MB). Peak memory consumption was 425.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (7998states) and FLOYD_HOARE automaton (currently 33 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 34 for 111ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 782969.1ms, OverallIterations: 259, TraceHistogramMax: 2, EmptinessCheckTime: 1946.0ms, AutomataDifference: 545068.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 81.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15790 SDtfs, 66180 SDslu, 147575 SDs, 0 SdLazy, 305381 SolverSat, 15896 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 183813.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17440 GetRequests, 5250 SyntacticMatches, 331 SemanticMatches, 11858 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222267 ImplicationChecksByTransitivity, 438387.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8000occurred in iteration=257, InterpolantAutomatonStates: 10063, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26256.1ms AutomataMinimizationTime, 258 MinimizatonAttempts, 576271 StatesRemovedByMinimization, 258 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 778.4ms SsaConstructionTime, 2332.6ms SatisfiabilityAnalysisTime, 150289.8ms InterpolantComputationTime, 14787 NumberOfCodeBlocks, 14783 NumberOfCodeBlocksAsserted, 812 NumberOfCheckSat, 14277 ConstructedInterpolants, 241 QuantifiedInterpolants, 218040 SizeOfPredicates, 1716 NumberOfNonLiveVariables, 16192 ConjunctsInSsa, 5383 ConjunctsInUnsatCore, 510 InterpolantComputations, 8 PerfectInterpolantSequences, 198/3567 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