/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/mult-flipped-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:36:10,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:36:10,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:36:10,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:36:10,566 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 [2021-05-21 20:36:10,599 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:36:10,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:36:10,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:36:10,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:36:10,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:36:10,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:36:10,602 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:36:10,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:36:10,602 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:36:10,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:36:10,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:36:10,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:36:10,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:36:10,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:36:10,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:36:10,604 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:36:10,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:36:10,604 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:36:10,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:36:10,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:36:10,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:36:10,605 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:36:10,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:36:10,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:36:10,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:36:10,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:36:10,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:36:10,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:36:10,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:36:10,606 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:36:10,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:36:10,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:36:10,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:36:10,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:36:10,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:36:10,915 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:36:10,916 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:36:10,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl [2021-05-21 20:36:10,932 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl' [2021-05-21 20:36:10,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:36:10,966 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:36:10,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:36:10,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:36:10,969 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:36:10,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:36:10" (1/1) ... [2021-05-21 20:36:10,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:36:10" (1/1) ... [2021-05-21 20:36:10,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:36:10,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:36:10,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:36:10,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:36:11,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:36:10" (1/1) ... [2021-05-21 20:36:11,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:36:10" (1/1) ... [2021-05-21 20:36:11,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:36:10" (1/1) ... [2021-05-21 20:36:11,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:36:10" (1/1) ... [2021-05-21 20:36:11,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:36:10" (1/1) ... [2021-05-21 20:36:11,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:36:10" (1/1) ... [2021-05-21 20:36:11,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:36:10" (1/1) ... [2021-05-21 20:36:11,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:36:11,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:36:11,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:36:11,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:36:11,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:36:10" (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 [2021-05-21 20:36:11,083 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:36:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:36:11,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:36:11,084 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:36:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:36:11,084 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:36:11,084 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:36:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:36:11,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:36:11,085 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 20:36:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 20:36:11,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 20:36:11,087 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:36:11,318 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:36:11,318 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 20:36:11,320 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:36:11 BoogieIcfgContainer [2021-05-21 20:36:11,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:36:11,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:36:11,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:36:11,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:36:11,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:36:10" (1/2) ... [2021-05-21 20:36:11,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50033477 and model type mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:36:11, skipping insertion in model container [2021-05-21 20:36:11,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:36:11" (2/2) ... [2021-05-21 20:36:11,326 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.bpl [2021-05-21 20:36:11,330 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:36:11,330 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:36:11,330 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:36:11,331 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:36:11,403 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 20:36:11,423 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 20:36:11,458 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:36:11,459 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:36:11,459 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:36:11,459 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:36:11,459 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:36:11,459 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:36:11,459 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:36:11,459 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:36:11,469 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-05-21 20:36:11,493 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:36:11,504 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:11,505 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:11,505 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:11,510 INFO L82 PathProgramCache]: Analyzing trace with hash 49297092, now seen corresponding path program 1 times [2021-05-21 20:36:11,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:11,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505095851] [2021-05-21 20:36:11,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:11,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:11,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505095851] [2021-05-21 20:36:11,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505095851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:36:11,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:36:11,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 20:36:11,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059399665] [2021-05-21 20:36:11,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:36:11,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:11,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:36:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:36:11,749 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:11,785 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-05-21 20:36:11,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:36:11,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:36:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:11,803 INFO L225 Difference]: With dead ends: 214 [2021-05-21 20:36:11,803 INFO L226 Difference]: Without dead ends: 199 [2021-05-21 20:36:11,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:36:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-21 20:36:11,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-05-21 20:36:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-05-21 20:36:11,855 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-05-21 20:36:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:11,856 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-05-21 20:36:11,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:11,857 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-05-21 20:36:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:36:11,858 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:11,858 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:11,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:36:11,859 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:11,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1895819686, now seen corresponding path program 1 times [2021-05-21 20:36:11,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:11,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832778833] [2021-05-21 20:36:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:11,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:11,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832778833] [2021-05-21 20:36:11,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832778833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:11,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771520052] [2021-05-21 20:36:11,899 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 [2021-05-21 20:36:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:11,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 20:36:11,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:12,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771520052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:12,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:12,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-21 20:36:12,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253469866] [2021-05-21 20:36:12,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:36:12,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:12,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:36:12,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:36:12,047 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:12,116 INFO L93 Difference]: Finished difference Result 344 states and 959 transitions. [2021-05-21 20:36:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:36:12,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:36:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:12,132 INFO L225 Difference]: With dead ends: 344 [2021-05-21 20:36:12,132 INFO L226 Difference]: Without dead ends: 344 [2021-05-21 20:36:12,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:36:12,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-21 20:36:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 172. [2021-05-21 20:36:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.953216374269006) internal successors, (505), 171 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 505 transitions. [2021-05-21 20:36:12,169 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 505 transitions. Word has length 17 [2021-05-21 20:36:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:12,169 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 505 transitions. [2021-05-21 20:36:12,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 505 transitions. [2021-05-21 20:36:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:36:12,171 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:12,171 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:12,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-21 20:36:12,372 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:12,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:12,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-05-21 20:36:12,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:12,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013321823] [2021-05-21 20:36:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:12,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:12,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013321823] [2021-05-21 20:36:12,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013321823] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:36:12,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:36:12,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:36:12,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244890626] [2021-05-21 20:36:12,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:36:12,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:12,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:36:12,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:36:12,409 INFO L87 Difference]: Start difference. First operand 172 states and 505 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:12,461 INFO L93 Difference]: Finished difference Result 237 states and 639 transitions. [2021-05-21 20:36:12,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:36:12,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:36:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:12,468 INFO L225 Difference]: With dead ends: 237 [2021-05-21 20:36:12,468 INFO L226 Difference]: Without dead ends: 227 [2021-05-21 20:36:12,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:36:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-21 20:36:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 186. [2021-05-21 20:36:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.843243243243243) internal successors, (526), 185 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 526 transitions. [2021-05-21 20:36:12,492 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 526 transitions. Word has length 17 [2021-05-21 20:36:12,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:12,493 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 526 transitions. [2021-05-21 20:36:12,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,493 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 526 transitions. [2021-05-21 20:36:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:36:12,494 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:12,495 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:12,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 20:36:12,495 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash 567041058, now seen corresponding path program 1 times [2021-05-21 20:36:12,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:12,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109178685] [2021-05-21 20:36:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:12,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:12,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109178685] [2021-05-21 20:36:12,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109178685] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:36:12,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:36:12,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:36:12,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790778873] [2021-05-21 20:36:12,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:36:12,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:12,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:36:12,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:36:12,554 INFO L87 Difference]: Start difference. First operand 186 states and 526 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:12,633 INFO L93 Difference]: Finished difference Result 241 states and 641 transitions. [2021-05-21 20:36:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:36:12,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:36:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:12,637 INFO L225 Difference]: With dead ends: 241 [2021-05-21 20:36:12,637 INFO L226 Difference]: Without dead ends: 207 [2021-05-21 20:36:12,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:36:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-21 20:36:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 192. [2021-05-21 20:36:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.8272251308900525) internal successors, (540), 191 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 540 transitions. [2021-05-21 20:36:12,662 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 540 transitions. Word has length 17 [2021-05-21 20:36:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:12,662 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 540 transitions. [2021-05-21 20:36:12,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 540 transitions. [2021-05-21 20:36:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:36:12,664 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:12,664 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:12,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 20:36:12,668 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:12,668 INFO L82 PathProgramCache]: Analyzing trace with hash -189703520, now seen corresponding path program 2 times [2021-05-21 20:36:12,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:12,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469218990] [2021-05-21 20:36:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:12,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:12,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469218990] [2021-05-21 20:36:12,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469218990] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:36:12,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:36:12,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:36:12,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585975478] [2021-05-21 20:36:12,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:36:12,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:12,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:36:12,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:36:12,711 INFO L87 Difference]: Start difference. First operand 192 states and 540 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:12,733 INFO L93 Difference]: Finished difference Result 214 states and 609 transitions. [2021-05-21 20:36:12,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:36:12,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:36:12,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:12,735 INFO L225 Difference]: With dead ends: 214 [2021-05-21 20:36:12,735 INFO L226 Difference]: Without dead ends: 214 [2021-05-21 20:36:12,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:36:12,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-21 20:36:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-05-21 20:36:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.882978723404255) internal successors, (542), 188 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 542 transitions. [2021-05-21 20:36:12,745 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 542 transitions. Word has length 17 [2021-05-21 20:36:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:12,745 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 542 transitions. [2021-05-21 20:36:12,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 542 transitions. [2021-05-21 20:36:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:36:12,747 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:12,747 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:12,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 20:36:12,747 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:12,748 INFO L82 PathProgramCache]: Analyzing trace with hash -142653028, now seen corresponding path program 3 times [2021-05-21 20:36:12,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:12,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795620777] [2021-05-21 20:36:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:12,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:12,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795620777] [2021-05-21 20:36:12,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795620777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:36:12,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:36:12,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:36:12,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715328967] [2021-05-21 20:36:12,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:36:12,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:36:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:36:12,823 INFO L87 Difference]: Start difference. First operand 189 states and 542 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:12,857 INFO L93 Difference]: Finished difference Result 254 states and 707 transitions. [2021-05-21 20:36:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:36:12,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:36:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:12,860 INFO L225 Difference]: With dead ends: 254 [2021-05-21 20:36:12,860 INFO L226 Difference]: Without dead ends: 254 [2021-05-21 20:36:12,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:36:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-21 20:36:12,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2021-05-21 20:36:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.894230769230769) internal successors, (602), 208 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 602 transitions. [2021-05-21 20:36:12,868 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 602 transitions. Word has length 17 [2021-05-21 20:36:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:12,869 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 602 transitions. [2021-05-21 20:36:12,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 602 transitions. [2021-05-21 20:36:12,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:36:12,870 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:12,870 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:12,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 20:36:12,870 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:12,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 2 times [2021-05-21 20:36:12,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:12,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403216921] [2021-05-21 20:36:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:12,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:12,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403216921] [2021-05-21 20:36:12,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403216921] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:36:12,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:36:12,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:36:12,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715011013] [2021-05-21 20:36:12,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:36:12,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:12,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:36:12,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:36:12,899 INFO L87 Difference]: Start difference. First operand 209 states and 602 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:12,923 INFO L93 Difference]: Finished difference Result 245 states and 714 transitions. [2021-05-21 20:36:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:36:12,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:36:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:12,925 INFO L225 Difference]: With dead ends: 245 [2021-05-21 20:36:12,926 INFO L226 Difference]: Without dead ends: 245 [2021-05-21 20:36:12,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:36:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-21 20:36:12,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 214. [2021-05-21 20:36:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9624413145539905) internal successors, (631), 213 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 631 transitions. [2021-05-21 20:36:12,934 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 631 transitions. Word has length 17 [2021-05-21 20:36:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:12,935 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 631 transitions. [2021-05-21 20:36:12,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 631 transitions. [2021-05-21 20:36:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:36:12,936 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:12,936 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:12,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 20:36:12,936 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:12,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:12,936 INFO L82 PathProgramCache]: Analyzing trace with hash -768893542, now seen corresponding path program 3 times [2021-05-21 20:36:12,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:12,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592843659] [2021-05-21 20:36:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:12,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:12,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592843659] [2021-05-21 20:36:12,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592843659] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:36:12,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:36:12,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:36:12,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208003443] [2021-05-21 20:36:12,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:36:12,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:12,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:36:12,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:36:12,986 INFO L87 Difference]: Start difference. First operand 214 states and 631 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:13,016 INFO L93 Difference]: Finished difference Result 237 states and 678 transitions. [2021-05-21 20:36:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:36:13,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:36:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:13,018 INFO L225 Difference]: With dead ends: 237 [2021-05-21 20:36:13,018 INFO L226 Difference]: Without dead ends: 225 [2021-05-21 20:36:13,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:36:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-21 20:36:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 193. [2021-05-21 20:36:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.9583333333333335) internal successors, (568), 192 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 568 transitions. [2021-05-21 20:36:13,025 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 568 transitions. Word has length 17 [2021-05-21 20:36:13,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:13,025 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 568 transitions. [2021-05-21 20:36:13,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 568 transitions. [2021-05-21 20:36:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:36:13,026 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:13,026 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:13,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-21 20:36:13,026 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:13,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:13,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1586125762, now seen corresponding path program 1 times [2021-05-21 20:36:13,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:13,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907318789] [2021-05-21 20:36:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:13,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907318789] [2021-05-21 20:36:13,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907318789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648942730] [2021-05-21 20:36:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-21 20:36:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:13,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 20:36:13,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:13,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648942730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:13,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:13,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-05-21 20:36:13,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086002345] [2021-05-21 20:36:13,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:36:13,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:13,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:36:13,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:36:13,160 INFO L87 Difference]: Start difference. First operand 193 states and 568 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:13,223 INFO L93 Difference]: Finished difference Result 254 states and 739 transitions. [2021-05-21 20:36:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:36:13,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 20:36:13,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:13,231 INFO L225 Difference]: With dead ends: 254 [2021-05-21 20:36:13,231 INFO L226 Difference]: Without dead ends: 254 [2021-05-21 20:36:13,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:13,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-21 20:36:13,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 190. [2021-05-21 20:36:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9100529100529102) internal successors, (550), 189 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 550 transitions. [2021-05-21 20:36:13,242 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 550 transitions. Word has length 19 [2021-05-21 20:36:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:13,242 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 550 transitions. [2021-05-21 20:36:13,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 550 transitions. [2021-05-21 20:36:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:13,244 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:13,245 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:13,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:13,465 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-05-21 20:36:13,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:13,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938442054] [2021-05-21 20:36:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:13,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:13,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938442054] [2021-05-21 20:36:13,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938442054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:13,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037257104] [2021-05-21 20:36:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:13,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:36:13,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:13,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037257104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:13,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:13,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 20:36:13,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54562104] [2021-05-21 20:36:13,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:13,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:13,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:13,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:13,712 INFO L87 Difference]: Start difference. First operand 190 states and 550 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-05-21 20:36:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:13,825 INFO L93 Difference]: Finished difference Result 342 states and 999 transitions. [2021-05-21 20:36:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:36:13,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:36:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:13,828 INFO L225 Difference]: With dead ends: 342 [2021-05-21 20:36:13,828 INFO L226 Difference]: Without dead ends: 327 [2021-05-21 20:36:13,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:36:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-21 20:36:13,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 245. [2021-05-21 20:36:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9836065573770494) internal successors, (728), 244 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 728 transitions. [2021-05-21 20:36:13,836 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 728 transitions. Word has length 21 [2021-05-21 20:36:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:13,837 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 728 transitions. [2021-05-21 20:36:13,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-05-21 20:36:13,837 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 728 transitions. [2021-05-21 20:36:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:13,838 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:13,838 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:14,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 20:36:14,053 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:14,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1334485332, now seen corresponding path program 2 times [2021-05-21 20:36:14,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:14,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175919164] [2021-05-21 20:36:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:14,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:14,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175919164] [2021-05-21 20:36:14,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175919164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:14,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622956392] [2021-05-21 20:36:14,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:14,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:14,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:14,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:36:14,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:14,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622956392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:14,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:14,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 20:36:14,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10207591] [2021-05-21 20:36:14,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:14,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:14,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:14,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:14,274 INFO L87 Difference]: Start difference. First operand 245 states and 728 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:36:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:14,374 INFO L93 Difference]: Finished difference Result 394 states and 1167 transitions. [2021-05-21 20:36:14,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:36:14,375 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 [2021-05-21 20:36:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:14,377 INFO L225 Difference]: With dead ends: 394 [2021-05-21 20:36:14,377 INFO L226 Difference]: Without dead ends: 379 [2021-05-21 20:36:14,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:36:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-21 20:36:14,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 280. [2021-05-21 20:36:14,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.978494623655914) internal successors, (831), 279 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 831 transitions. [2021-05-21 20:36:14,386 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 831 transitions. Word has length 21 [2021-05-21 20:36:14,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:14,386 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 831 transitions. [2021-05-21 20:36:14,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:36:14,386 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 831 transitions. [2021-05-21 20:36:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:14,387 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:14,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:14,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:14,601 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:14,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1241595234, now seen corresponding path program 3 times [2021-05-21 20:36:14,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:14,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763730396] [2021-05-21 20:36:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:14,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:14,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763730396] [2021-05-21 20:36:14,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763730396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:14,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402268621] [2021-05-21 20:36:14,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:14,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:36:14,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:14,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:36:14,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:14,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402268621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:14,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:14,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 20:36:14,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522134203] [2021-05-21 20:36:14,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:14,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:14,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:14,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:14,818 INFO L87 Difference]: Start difference. First operand 280 states and 831 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-05-21 20:36:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:14,894 INFO L93 Difference]: Finished difference Result 413 states and 1224 transitions. [2021-05-21 20:36:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:36:14,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:36:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:14,896 INFO L225 Difference]: With dead ends: 413 [2021-05-21 20:36:14,896 INFO L226 Difference]: Without dead ends: 398 [2021-05-21 20:36:14,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:36:14,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-21 20:36:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 292. [2021-05-21 20:36:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.979381443298969) internal successors, (867), 291 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 867 transitions. [2021-05-21 20:36:14,905 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 867 transitions. Word has length 21 [2021-05-21 20:36:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:14,906 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 867 transitions. [2021-05-21 20:36:14,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-05-21 20:36:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 867 transitions. [2021-05-21 20:36:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:14,907 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:14,907 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:15,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-21 20:36:15,121 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash 204187218, now seen corresponding path program 4 times [2021-05-21 20:36:15,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:15,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456523840] [2021-05-21 20:36:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:15,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:15,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456523840] [2021-05-21 20:36:15,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456523840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:15,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870838334] [2021-05-21 20:36:15,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:15,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:15,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:15,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:36:15,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:15,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870838334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:15,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:15,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 20:36:15,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271634197] [2021-05-21 20:36:15,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:15,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:15,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:15,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:15,303 INFO L87 Difference]: Start difference. First operand 292 states and 867 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:36:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:15,400 INFO L93 Difference]: Finished difference Result 421 states and 1248 transitions. [2021-05-21 20:36:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:36:15,401 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 [2021-05-21 20:36:15,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:15,403 INFO L225 Difference]: With dead ends: 421 [2021-05-21 20:36:15,403 INFO L226 Difference]: Without dead ends: 406 [2021-05-21 20:36:15,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:36:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-21 20:36:15,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 316. [2021-05-21 20:36:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.980952380952381) internal successors, (939), 315 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 939 transitions. [2021-05-21 20:36:15,413 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 939 transitions. Word has length 21 [2021-05-21 20:36:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:15,414 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 939 transitions. [2021-05-21 20:36:15,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:36:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 939 transitions. [2021-05-21 20:36:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:15,416 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:15,416 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:15,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:15,633 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:15,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1380051106, now seen corresponding path program 5 times [2021-05-21 20:36:15,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:15,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624221466] [2021-05-21 20:36:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:15,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:15,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624221466] [2021-05-21 20:36:15,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624221466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:15,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181301911] [2021-05-21 20:36:15,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:15,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:15,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:15,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:36:15,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:15,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181301911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:15,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:15,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 20:36:15,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605141762] [2021-05-21 20:36:15,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:15,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:15,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:15,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:15,824 INFO L87 Difference]: Start difference. First operand 316 states and 939 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:36:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:15,897 INFO L93 Difference]: Finished difference Result 491 states and 1452 transitions. [2021-05-21 20:36:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:36:15,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 [2021-05-21 20:36:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:15,900 INFO L225 Difference]: With dead ends: 491 [2021-05-21 20:36:15,900 INFO L226 Difference]: Without dead ends: 476 [2021-05-21 20:36:15,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:36:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-05-21 20:36:15,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 341. [2021-05-21 20:36:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.973529411764706) internal successors, (1011), 340 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1011 transitions. [2021-05-21 20:36:15,910 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1011 transitions. Word has length 21 [2021-05-21 20:36:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:15,911 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1011 transitions. [2021-05-21 20:36:15,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-05-21 20:36:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1011 transitions. [2021-05-21 20:36:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:36:15,912 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:15,913 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:16,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 20:36:16,129 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1758862818, now seen corresponding path program 6 times [2021-05-21 20:36:16,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:16,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123196409] [2021-05-21 20:36:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:16,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:16,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123196409] [2021-05-21 20:36:16,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123196409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:16,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279051566] [2021-05-21 20:36:16,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:16,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:36:16,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 20:36:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:16,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279051566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:16,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:16,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 20:36:16,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923315787] [2021-05-21 20:36:16,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:16,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:16,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:16,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:16,305 INFO L87 Difference]: Start difference. First operand 341 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2021-05-21 20:36:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:16,418 INFO L93 Difference]: Finished difference Result 473 states and 1400 transitions. [2021-05-21 20:36:16,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:36:16,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 [2021-05-21 20:36:16,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:16,421 INFO L225 Difference]: With dead ends: 473 [2021-05-21 20:36:16,421 INFO L226 Difference]: Without dead ends: 458 [2021-05-21 20:36:16,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:36:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-21 20:36:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 341. [2021-05-21 20:36:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.973529411764706) internal successors, (1011), 340 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1011 transitions. [2021-05-21 20:36:16,431 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1011 transitions. Word has length 21 [2021-05-21 20:36:16,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:16,431 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1011 transitions. [2021-05-21 20:36:16,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2021-05-21 20:36:16,432 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1011 transitions. [2021-05-21 20:36:16,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:16,432 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:16,433 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:16,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 20:36:16,647 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:16,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1287155254, now seen corresponding path program 7 times [2021-05-21 20:36:16,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:16,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213861810] [2021-05-21 20:36:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:16,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:16,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213861810] [2021-05-21 20:36:16,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213861810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:16,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076542950] [2021-05-21 20:36:16,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:16,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:16,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:16,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076542950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:16,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:16,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 20:36:16,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439587260] [2021-05-21 20:36:16,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:16,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:16,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:16,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:16,816 INFO L87 Difference]: Start difference. First operand 341 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-05-21 20:36:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:16,950 INFO L93 Difference]: Finished difference Result 749 states and 2150 transitions. [2021-05-21 20:36:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:36:16,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 23 [2021-05-21 20:36:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:16,953 INFO L225 Difference]: With dead ends: 749 [2021-05-21 20:36:16,953 INFO L226 Difference]: Without dead ends: 749 [2021-05-21 20:36:16,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-05-21 20:36:16,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 430. [2021-05-21 20:36:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1095571095571097) internal successors, (1334), 429 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1334 transitions. [2021-05-21 20:36:16,968 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1334 transitions. Word has length 23 [2021-05-21 20:36:16,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:16,968 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1334 transitions. [2021-05-21 20:36:16,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-05-21 20:36:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1334 transitions. [2021-05-21 20:36:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:16,969 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:16,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:17,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 20:36:17,192 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:17,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1821721226, now seen corresponding path program 8 times [2021-05-21 20:36:17,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:17,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961558482] [2021-05-21 20:36:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:17,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:17,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961558482] [2021-05-21 20:36:17,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961558482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:17,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473183460] [2021-05-21 20:36:17,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:17,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:17,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:17,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:17,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473183460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:17,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:17,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-21 20:36:17,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056522756] [2021-05-21 20:36:17,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:17,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:17,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:17,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:17,318 INFO L87 Difference]: Start difference. First operand 430 states and 1334 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-05-21 20:36:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:17,430 INFO L93 Difference]: Finished difference Result 758 states and 2270 transitions. [2021-05-21 20:36:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:36:17,431 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 23 [2021-05-21 20:36:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:17,434 INFO L225 Difference]: With dead ends: 758 [2021-05-21 20:36:17,434 INFO L226 Difference]: Without dead ends: 733 [2021-05-21 20:36:17,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:36:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-05-21 20:36:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 583. [2021-05-21 20:36:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.1597938144329896) internal successors, (1839), 582 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:17,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1839 transitions. [2021-05-21 20:36:17,450 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1839 transitions. Word has length 23 [2021-05-21 20:36:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:17,450 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1839 transitions. [2021-05-21 20:36:17,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-05-21 20:36:17,451 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1839 transitions. [2021-05-21 20:36:17,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:17,452 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:17,452 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:17,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 20:36:17,661 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:17,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:17,661 INFO L82 PathProgramCache]: Analyzing trace with hash -63390266, now seen corresponding path program 9 times [2021-05-21 20:36:17,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:17,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878904318] [2021-05-21 20:36:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:17,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:17,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878904318] [2021-05-21 20:36:17,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878904318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:17,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103796253] [2021-05-21 20:36:17,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:17,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:36:17,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:17,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:17,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:17,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103796253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:17,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:17,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-21 20:36:17,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493638165] [2021-05-21 20:36:17,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:36:17,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:17,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:36:17,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:36:17,754 INFO L87 Difference]: Start difference. First operand 583 states and 1839 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:17,841 INFO L93 Difference]: Finished difference Result 1311 states and 4123 transitions. [2021-05-21 20:36:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:36:17,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 20:36:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:17,848 INFO L225 Difference]: With dead ends: 1311 [2021-05-21 20:36:17,848 INFO L226 Difference]: Without dead ends: 1275 [2021-05-21 20:36:17,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:36:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-05-21 20:36:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 821. [2021-05-21 20:36:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.34390243902439) internal successors, (2742), 820 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2742 transitions. [2021-05-21 20:36:17,873 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2742 transitions. Word has length 23 [2021-05-21 20:36:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:17,873 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2742 transitions. [2021-05-21 20:36:17,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2742 transitions. [2021-05-21 20:36:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:17,876 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:17,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:18,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 20:36:18,089 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:18,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1548958394, now seen corresponding path program 10 times [2021-05-21 20:36:18,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:18,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329006069] [2021-05-21 20:36:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:18,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:18,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329006069] [2021-05-21 20:36:18,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329006069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:18,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426725456] [2021-05-21 20:36:18,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:18,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:18,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:18,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:18,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426725456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:18,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:18,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-21 20:36:18,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688580595] [2021-05-21 20:36:18,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:36:18,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:18,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:36:18,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:36:18,233 INFO L87 Difference]: Start difference. First operand 821 states and 2742 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:18,334 INFO L93 Difference]: Finished difference Result 1047 states and 3326 transitions. [2021-05-21 20:36:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:36:18,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 20:36:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:18,340 INFO L225 Difference]: With dead ends: 1047 [2021-05-21 20:36:18,340 INFO L226 Difference]: Without dead ends: 1047 [2021-05-21 20:36:18,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:36:18,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-05-21 20:36:18,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 829. [2021-05-21 20:36:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.321256038647343) internal successors, (2750), 828 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2750 transitions. [2021-05-21 20:36:18,367 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2750 transitions. Word has length 23 [2021-05-21 20:36:18,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:18,367 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2750 transitions. [2021-05-21 20:36:18,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2750 transitions. [2021-05-21 20:36:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:18,370 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:18,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:18,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:18,592 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1102347518, now seen corresponding path program 11 times [2021-05-21 20:36:18,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:18,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135682863] [2021-05-21 20:36:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:18,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:18,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135682863] [2021-05-21 20:36:18,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135682863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:18,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083691408] [2021-05-21 20:36:18,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:18,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:36:18,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:18,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:18,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:18,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083691408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:18,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:18,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-21 20:36:18,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055057869] [2021-05-21 20:36:18,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:36:18,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:18,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:36:18,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:36:18,725 INFO L87 Difference]: Start difference. First operand 829 states and 2750 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:18,812 INFO L93 Difference]: Finished difference Result 1062 states and 3341 transitions. [2021-05-21 20:36:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:36:18,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 20:36:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:18,817 INFO L225 Difference]: With dead ends: 1062 [2021-05-21 20:36:18,817 INFO L226 Difference]: Without dead ends: 1056 [2021-05-21 20:36:18,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:36:18,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-05-21 20:36:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 852. [2021-05-21 20:36:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.2925969447708576) internal successors, (2802), 851 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2802 transitions. [2021-05-21 20:36:18,841 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2802 transitions. Word has length 23 [2021-05-21 20:36:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:18,841 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2802 transitions. [2021-05-21 20:36:18,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2802 transitions. [2021-05-21 20:36:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:18,843 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:18,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:19,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-05-21 20:36:19,057 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash 50200326, now seen corresponding path program 12 times [2021-05-21 20:36:19,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:19,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996429895] [2021-05-21 20:36:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:19,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:19,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996429895] [2021-05-21 20:36:19,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996429895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:19,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653132285] [2021-05-21 20:36:19,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:19,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:36:19,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:19,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:19,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:19,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653132285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:19,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:19,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-21 20:36:19,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463008065] [2021-05-21 20:36:19,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:19,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:19,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:19,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:19,152 INFO L87 Difference]: Start difference. First operand 852 states and 2802 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) 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) [2021-05-21 20:36:19,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:19,543 INFO L93 Difference]: Finished difference Result 2185 states and 6702 transitions. [2021-05-21 20:36:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:36:19,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) 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 23 [2021-05-21 20:36:19,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:19,552 INFO L225 Difference]: With dead ends: 2185 [2021-05-21 20:36:19,553 INFO L226 Difference]: Without dead ends: 2149 [2021-05-21 20:36:19,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:36:19,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-05-21 20:36:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 941. [2021-05-21 20:36:19,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.331914893617021) internal successors, (3132), 940 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3132 transitions. [2021-05-21 20:36:19,587 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3132 transitions. Word has length 23 [2021-05-21 20:36:19,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:19,588 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 3132 transitions. [2021-05-21 20:36:19,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) 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) [2021-05-21 20:36:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3132 transitions. [2021-05-21 20:36:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:19,591 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:19,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:19,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:19,808 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash -32096124, now seen corresponding path program 13 times [2021-05-21 20:36:19,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:19,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208665458] [2021-05-21 20:36:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:19,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:19,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208665458] [2021-05-21 20:36:19,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208665458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:19,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764834076] [2021-05-21 20:36:19,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:19,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:19,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:19,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764834076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:19,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:19,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-21 20:36:19,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52376519] [2021-05-21 20:36:19,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:36:19,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:19,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:36:19,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:36:19,932 INFO L87 Difference]: Start difference. First operand 941 states and 3132 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:20,019 INFO L93 Difference]: Finished difference Result 1660 states and 5311 transitions. [2021-05-21 20:36:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:36:20,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 20:36:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:20,027 INFO L225 Difference]: With dead ends: 1660 [2021-05-21 20:36:20,027 INFO L226 Difference]: Without dead ends: 1660 [2021-05-21 20:36:20,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:36:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-05-21 20:36:20,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1146. [2021-05-21 20:36:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.4) internal successors, (3893), 1145 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3893 transitions. [2021-05-21 20:36:20,059 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3893 transitions. Word has length 23 [2021-05-21 20:36:20,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:20,059 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3893 transitions. [2021-05-21 20:36:20,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:20,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3893 transitions. [2021-05-21 20:36:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:20,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:20,062 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:20,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 20:36:20,287 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:20,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:20,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1539696380, now seen corresponding path program 14 times [2021-05-21 20:36:20,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:20,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006322377] [2021-05-21 20:36:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:20,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:20,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006322377] [2021-05-21 20:36:20,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006322377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:20,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762346243] [2021-05-21 20:36:20,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:20,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:20,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:20,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:20,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:20,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762346243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:20,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:20,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-21 20:36:20,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198792772] [2021-05-21 20:36:20,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:36:20,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:20,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:36:20,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:36:20,425 INFO L87 Difference]: Start difference. First operand 1146 states and 3893 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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) [2021-05-21 20:36:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:20,789 INFO L93 Difference]: Finished difference Result 2541 states and 8351 transitions. [2021-05-21 20:36:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:36:20,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 23 [2021-05-21 20:36:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:20,801 INFO L225 Difference]: With dead ends: 2541 [2021-05-21 20:36:20,801 INFO L226 Difference]: Without dead ends: 2369 [2021-05-21 20:36:20,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:36:20,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-05-21 20:36:20,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1684. [2021-05-21 20:36:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.474747474747475) internal successors, (5848), 1683 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5848 transitions. [2021-05-21 20:36:20,843 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5848 transitions. Word has length 23 [2021-05-21 20:36:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:20,843 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 5848 transitions. [2021-05-21 20:36:20,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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) [2021-05-21 20:36:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5848 transitions. [2021-05-21 20:36:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:20,847 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:20,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:21,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:21,061 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:21,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2142929212, now seen corresponding path program 15 times [2021-05-21 20:36:21,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:21,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711012723] [2021-05-21 20:36:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:21,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:21,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711012723] [2021-05-21 20:36:21,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711012723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:21,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956204078] [2021-05-21 20:36:21,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:21,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:36:21,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:21,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:21,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:21,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956204078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:21,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:21,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-21 20:36:21,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076959819] [2021-05-21 20:36:21,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:36:21,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:21,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:36:21,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:36:21,193 INFO L87 Difference]: Start difference. First operand 1684 states and 5848 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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) [2021-05-21 20:36:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:21,525 INFO L93 Difference]: Finished difference Result 4179 states and 14030 transitions. [2021-05-21 20:36:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:36:21,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 23 [2021-05-21 20:36:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:21,536 INFO L225 Difference]: With dead ends: 4179 [2021-05-21 20:36:21,536 INFO L226 Difference]: Without dead ends: 4076 [2021-05-21 20:36:21,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:36:21,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-05-21 20:36:21,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 2798. [2021-05-21 20:36:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.5723989989274223) internal successors, (9992), 2797 states have internal predecessors, (9992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 9992 transitions. [2021-05-21 20:36:21,624 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 9992 transitions. Word has length 23 [2021-05-21 20:36:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:21,624 INFO L482 AbstractCegarLoop]: Abstraction has 2798 states and 9992 transitions. [2021-05-21 20:36:21,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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) [2021-05-21 20:36:21,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 9992 transitions. [2021-05-21 20:36:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:21,630 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:21,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:21,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 20:36:21,845 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:21,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2023712944, now seen corresponding path program 16 times [2021-05-21 20:36:21,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:21,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668936721] [2021-05-21 20:36:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:21,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:21,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668936721] [2021-05-21 20:36:21,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668936721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:21,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090208160] [2021-05-21 20:36:21,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:21,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:21,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:21,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:21,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:21,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090208160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:21,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:21,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-05-21 20:36:21,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791386878] [2021-05-21 20:36:21,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:21,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:21,953 INFO L87 Difference]: Start difference. First operand 2798 states and 9992 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-05-21 20:36:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:22,062 INFO L93 Difference]: Finished difference Result 3396 states and 11614 transitions. [2021-05-21 20:36:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:36:22,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 23 [2021-05-21 20:36:22,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:22,073 INFO L225 Difference]: With dead ends: 3396 [2021-05-21 20:36:22,073 INFO L226 Difference]: Without dead ends: 3345 [2021-05-21 20:36:22,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:36:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-05-21 20:36:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 2812. [2021-05-21 20:36:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 3.55923159018143) internal successors, (10005), 2811 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:22,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 10005 transitions. [2021-05-21 20:36:22,140 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 10005 transitions. Word has length 23 [2021-05-21 20:36:22,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:22,141 INFO L482 AbstractCegarLoop]: Abstraction has 2812 states and 10005 transitions. [2021-05-21 20:36:22,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-05-21 20:36:22,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 10005 transitions. [2021-05-21 20:36:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:22,148 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:22,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:22,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 20:36:22,361 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:22,361 INFO L82 PathProgramCache]: Analyzing trace with hash 783282608, now seen corresponding path program 17 times [2021-05-21 20:36:22,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:22,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915065588] [2021-05-21 20:36:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:22,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:22,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915065588] [2021-05-21 20:36:22,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915065588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:22,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408698714] [2021-05-21 20:36:22,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:22,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:22,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:22,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:22,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:22,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408698714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:22,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:22,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 20:36:22,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438538834] [2021-05-21 20:36:22,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:36:22,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:22,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:36:22,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:36:22,466 INFO L87 Difference]: Start difference. First operand 2812 states and 10005 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:22,539 INFO L93 Difference]: Finished difference Result 4023 states and 13889 transitions. [2021-05-21 20:36:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:36:22,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 20:36:22,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:22,550 INFO L225 Difference]: With dead ends: 4023 [2021-05-21 20:36:22,550 INFO L226 Difference]: Without dead ends: 4005 [2021-05-21 20:36:22,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:36:22,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-05-21 20:36:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3260. [2021-05-21 20:36:22,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 3.59159251304081) internal successors, (11705), 3259 states have internal predecessors, (11705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 11705 transitions. [2021-05-21 20:36:22,626 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 11705 transitions. Word has length 23 [2021-05-21 20:36:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:22,627 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 11705 transitions. [2021-05-21 20:36:22,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 11705 transitions. [2021-05-21 20:36:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:22,634 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:22,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:22,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 20:36:22,849 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:22,849 INFO L82 PathProgramCache]: Analyzing trace with hash 530496180, now seen corresponding path program 18 times [2021-05-21 20:36:22,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:22,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289043653] [2021-05-21 20:36:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:22,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:22,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289043653] [2021-05-21 20:36:22,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289043653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:22,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236155199] [2021-05-21 20:36:22,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:22,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:36:22,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:22,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:22,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:36:22,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236155199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:22,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:22,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-21 20:36:22,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133853702] [2021-05-21 20:36:22,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:22,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:22,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:22,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:22,951 INFO L87 Difference]: Start difference. First operand 3260 states and 11705 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) 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) [2021-05-21 20:36:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:23,338 INFO L93 Difference]: Finished difference Result 8888 states and 30108 transitions. [2021-05-21 20:36:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 20:36:23,338 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) 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 23 [2021-05-21 20:36:23,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:23,357 INFO L225 Difference]: With dead ends: 8888 [2021-05-21 20:36:23,357 INFO L226 Difference]: Without dead ends: 8754 [2021-05-21 20:36:23,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:36:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8754 states. [2021-05-21 20:36:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8754 to 5409. [2021-05-21 20:36:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5409 states, 5408 states have (on average 3.689164201183432) internal successors, (19951), 5408 states have internal predecessors, (19951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 19951 transitions. [2021-05-21 20:36:23,534 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 19951 transitions. Word has length 23 [2021-05-21 20:36:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:23,534 INFO L482 AbstractCegarLoop]: Abstraction has 5409 states and 19951 transitions. [2021-05-21 20:36:23,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) 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) [2021-05-21 20:36:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 19951 transitions. [2021-05-21 20:36:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:23,546 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:23,546 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:23,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 20:36:23,761 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:23,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:23,761 INFO L82 PathProgramCache]: Analyzing trace with hash 254898436, now seen corresponding path program 19 times [2021-05-21 20:36:23,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:23,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658356509] [2021-05-21 20:36:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:23,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:23,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658356509] [2021-05-21 20:36:23,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658356509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:23,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363759706] [2021-05-21 20:36:23,788 INFO 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 [2021-05-21 20:36:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:23,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:23,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:23,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363759706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:23,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:23,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-21 20:36:23,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669166967] [2021-05-21 20:36:23,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:36:23,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:23,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:36:23,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:36:23,868 INFO L87 Difference]: Start difference. First operand 5409 states and 19951 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:23,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:23,966 INFO L93 Difference]: Finished difference Result 6626 states and 23548 transitions. [2021-05-21 20:36:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:36:23,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 20:36:23,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:23,981 INFO L225 Difference]: With dead ends: 6626 [2021-05-21 20:36:23,981 INFO L226 Difference]: Without dead ends: 6576 [2021-05-21 20:36:23,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:36:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-05-21 20:36:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 5617. [2021-05-21 20:36:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5617 states, 5616 states have (on average 3.6428062678062676) internal successors, (20458), 5616 states have internal predecessors, (20458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5617 states to 5617 states and 20458 transitions. [2021-05-21 20:36:24,158 INFO L78 Accepts]: Start accepts. Automaton has 5617 states and 20458 transitions. Word has length 23 [2021-05-21 20:36:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:24,158 INFO L482 AbstractCegarLoop]: Abstraction has 5617 states and 20458 transitions. [2021-05-21 20:36:24,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 5617 states and 20458 transitions. [2021-05-21 20:36:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:24,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:24,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:24,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 20:36:24,391 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:24,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:24,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1159769024, now seen corresponding path program 20 times [2021-05-21 20:36:24,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:24,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742324748] [2021-05-21 20:36:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:24,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:24,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742324748] [2021-05-21 20:36:24,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742324748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:24,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437647599] [2021-05-21 20:36:24,415 INFO L93 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 [2021-05-21 20:36:24,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:24,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:24,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:36:24,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437647599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:24,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:24,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-21 20:36:24,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323009638] [2021-05-21 20:36:24,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:24,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:24,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:24,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:24,506 INFO L87 Difference]: Start difference. First operand 5617 states and 20458 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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) [2021-05-21 20:36:24,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:24,887 INFO L93 Difference]: Finished difference Result 12332 states and 42412 transitions. [2021-05-21 20:36:24,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 20:36:24,887 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 23 [2021-05-21 20:36:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:24,906 INFO L225 Difference]: With dead ends: 12332 [2021-05-21 20:36:24,906 INFO L226 Difference]: Without dead ends: 12185 [2021-05-21 20:36:24,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:36:24,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12185 states. [2021-05-21 20:36:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12185 to 8357. [2021-05-21 20:36:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8356 states have (on average 3.7277405457156534) internal successors, (31149), 8356 states have internal predecessors, (31149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 31149 transitions. [2021-05-21 20:36:25,170 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 31149 transitions. Word has length 23 [2021-05-21 20:36:25,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:25,170 INFO L482 AbstractCegarLoop]: Abstraction has 8357 states and 31149 transitions. [2021-05-21 20:36:25,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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) [2021-05-21 20:36:25,170 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 31149 transitions. [2021-05-21 20:36:25,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:36:25,187 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:25,187 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:25,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:25,409 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:25,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1991076932, now seen corresponding path program 21 times [2021-05-21 20:36:25,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:25,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883839966] [2021-05-21 20:36:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:25,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:25,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883839966] [2021-05-21 20:36:25,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883839966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:25,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906610276] [2021-05-21 20:36:25,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:25,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:36:25,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:25,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 20:36:25,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:36:25,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906610276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:25,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:25,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-21 20:36:25,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133539706] [2021-05-21 20:36:25,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:36:25,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:25,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:36:25,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:36:25,503 INFO L87 Difference]: Start difference. First operand 8357 states and 31149 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) 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) [2021-05-21 20:36:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:25,800 INFO L93 Difference]: Finished difference Result 11103 states and 39610 transitions. [2021-05-21 20:36:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:36:25,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) 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 23 [2021-05-21 20:36:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:25,818 INFO L225 Difference]: With dead ends: 11103 [2021-05-21 20:36:25,819 INFO L226 Difference]: Without dead ends: 10950 [2021-05-21 20:36:25,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:36:25,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-05-21 20:36:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 8492. [2021-05-21 20:36:26,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8492 states, 8491 states have (on average 3.725120716052291) internal successors, (31630), 8491 states have internal predecessors, (31630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8492 states to 8492 states and 31630 transitions. [2021-05-21 20:36:26,063 INFO L78 Accepts]: Start accepts. Automaton has 8492 states and 31630 transitions. Word has length 23 [2021-05-21 20:36:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:26,063 INFO L482 AbstractCegarLoop]: Abstraction has 8492 states and 31630 transitions. [2021-05-21 20:36:26,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) 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) [2021-05-21 20:36:26,063 INFO L276 IsEmpty]: Start isEmpty. Operand 8492 states and 31630 transitions. [2021-05-21 20:36:26,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:26,081 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:26,081 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:26,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:26,303 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:26,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:26,303 INFO L82 PathProgramCache]: Analyzing trace with hash -553390134, now seen corresponding path program 22 times [2021-05-21 20:36:26,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:26,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53486754] [2021-05-21 20:36:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:26,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:26,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53486754] [2021-05-21 20:36:26,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53486754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:26,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773347928] [2021-05-21 20:36:26,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:26,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:26,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:26,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:26,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:26,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773347928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:26,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:26,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:26,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243763175] [2021-05-21 20:36:26,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:26,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:26,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:26,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:26,746 INFO L87 Difference]: Start difference. First operand 8492 states and 31630 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:27,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:27,103 INFO L93 Difference]: Finished difference Result 8694 states and 32230 transitions. [2021-05-21 20:36:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:36:27,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:27,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:27,120 INFO L225 Difference]: With dead ends: 8694 [2021-05-21 20:36:27,120 INFO L226 Difference]: Without dead ends: 8679 [2021-05-21 20:36:27,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:36:27,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8679 states. [2021-05-21 20:36:27,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8679 to 8558. [2021-05-21 20:36:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8558 states, 8557 states have (on average 3.722098866425149) internal successors, (31850), 8557 states have internal predecessors, (31850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 31850 transitions. [2021-05-21 20:36:27,328 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 31850 transitions. Word has length 27 [2021-05-21 20:36:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:27,328 INFO L482 AbstractCegarLoop]: Abstraction has 8558 states and 31850 transitions. [2021-05-21 20:36:27,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 31850 transitions. [2021-05-21 20:36:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:27,347 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:27,347 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:27,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:27,567 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:27,568 INFO L82 PathProgramCache]: Analyzing trace with hash -546769482, now seen corresponding path program 23 times [2021-05-21 20:36:27,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:27,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764130058] [2021-05-21 20:36:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:27,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:27,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764130058] [2021-05-21 20:36:27,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764130058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:27,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142187395] [2021-05-21 20:36:27,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:27,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:36:27,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:27,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:27,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:27,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142187395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:27,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:27,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:27,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872668736] [2021-05-21 20:36:27,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:27,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:27,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:27,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:27,858 INFO L87 Difference]: Start difference. First operand 8558 states and 31850 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:28,171 INFO L93 Difference]: Finished difference Result 8977 states and 33000 transitions. [2021-05-21 20:36:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:28,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:28,191 INFO L225 Difference]: With dead ends: 8977 [2021-05-21 20:36:28,192 INFO L226 Difference]: Without dead ends: 8896 [2021-05-21 20:36:28,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:36:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2021-05-21 20:36:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8629. [2021-05-21 20:36:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8629 states, 8628 states have (on average 3.7192860454334724) internal successors, (32090), 8628 states have internal predecessors, (32090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8629 states to 8629 states and 32090 transitions. [2021-05-21 20:36:28,391 INFO L78 Accepts]: Start accepts. Automaton has 8629 states and 32090 transitions. Word has length 27 [2021-05-21 20:36:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:28,391 INFO L482 AbstractCegarLoop]: Abstraction has 8629 states and 32090 transitions. [2021-05-21 20:36:28,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 8629 states and 32090 transitions. [2021-05-21 20:36:28,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:28,411 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:28,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:28,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-21 20:36:28,625 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:28,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1765844602, now seen corresponding path program 24 times [2021-05-21 20:36:28,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:28,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160503423] [2021-05-21 20:36:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:28,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:28,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160503423] [2021-05-21 20:36:28,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160503423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:28,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784887711] [2021-05-21 20:36:28,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:28,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:36:28,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:28,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:28,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784887711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:28,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:28,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:28,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714639620] [2021-05-21 20:36:28,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:28,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:28,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:28,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:28,908 INFO L87 Difference]: Start difference. First operand 8629 states and 32090 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:29,168 INFO L93 Difference]: Finished difference Result 9107 states and 33442 transitions. [2021-05-21 20:36:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:29,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:29,183 INFO L225 Difference]: With dead ends: 9107 [2021-05-21 20:36:29,183 INFO L226 Difference]: Without dead ends: 9029 [2021-05-21 20:36:29,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:36:29,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9029 states. [2021-05-21 20:36:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9029 to 8705. [2021-05-21 20:36:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8705 states, 8704 states have (on average 3.7188648897058822) internal successors, (32369), 8704 states have internal predecessors, (32369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:29,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8705 states to 8705 states and 32369 transitions. [2021-05-21 20:36:29,391 INFO L78 Accepts]: Start accepts. Automaton has 8705 states and 32369 transitions. Word has length 27 [2021-05-21 20:36:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:29,392 INFO L482 AbstractCegarLoop]: Abstraction has 8705 states and 32369 transitions. [2021-05-21 20:36:29,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 8705 states and 32369 transitions. [2021-05-21 20:36:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:29,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:29,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:29,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:29,610 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:29,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1801149938, now seen corresponding path program 25 times [2021-05-21 20:36:29,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:29,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453616995] [2021-05-21 20:36:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:29,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:29,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453616995] [2021-05-21 20:36:29,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453616995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:29,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521580652] [2021-05-21 20:36:29,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:29,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:29,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521580652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:29,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:29,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:29,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099556987] [2021-05-21 20:36:29,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:29,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:29,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:29,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:29,882 INFO L87 Difference]: Start difference. First operand 8705 states and 32369 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:30,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:30,221 INFO L93 Difference]: Finished difference Result 9134 states and 33615 transitions. [2021-05-21 20:36:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:30,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:30,238 INFO L225 Difference]: With dead ends: 9134 [2021-05-21 20:36:30,238 INFO L226 Difference]: Without dead ends: 9104 [2021-05-21 20:36:30,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:36:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9104 states. [2021-05-21 20:36:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9104 to 8799. [2021-05-21 20:36:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8799 states, 8798 states have (on average 3.7176631052511935) internal successors, (32708), 8798 states have internal predecessors, (32708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8799 states to 8799 states and 32708 transitions. [2021-05-21 20:36:30,381 INFO L78 Accepts]: Start accepts. Automaton has 8799 states and 32708 transitions. Word has length 27 [2021-05-21 20:36:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:30,382 INFO L482 AbstractCegarLoop]: Abstraction has 8799 states and 32708 transitions. [2021-05-21 20:36:30,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 8799 states and 32708 transitions. [2021-05-21 20:36:30,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:30,394 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:30,394 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:30,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-21 20:36:30,594 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:30,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:30,595 INFO L82 PathProgramCache]: Analyzing trace with hash -181203274, now seen corresponding path program 26 times [2021-05-21 20:36:30,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:30,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101676090] [2021-05-21 20:36:30,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:30,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:30,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101676090] [2021-05-21 20:36:30,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101676090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:30,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176967452] [2021-05-21 20:36:30,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:30,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:30,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:30,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:30,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:30,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176967452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:30,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:30,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:30,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367737629] [2021-05-21 20:36:30,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:30,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:30,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:30,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:30,816 INFO L87 Difference]: Start difference. First operand 8799 states and 32708 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:31,112 INFO L93 Difference]: Finished difference Result 9600 states and 35001 transitions. [2021-05-21 20:36:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:36:31,113 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:31,133 INFO L225 Difference]: With dead ends: 9600 [2021-05-21 20:36:31,133 INFO L226 Difference]: Without dead ends: 9541 [2021-05-21 20:36:31,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:36:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-05-21 20:36:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8909. [2021-05-21 20:36:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8909 states, 8908 states have (on average 3.7182308037718905) internal successors, (33122), 8908 states have internal predecessors, (33122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8909 states to 8909 states and 33122 transitions. [2021-05-21 20:36:31,317 INFO L78 Accepts]: Start accepts. Automaton has 8909 states and 33122 transitions. Word has length 27 [2021-05-21 20:36:31,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:31,317 INFO L482 AbstractCegarLoop]: Abstraction has 8909 states and 33122 transitions. [2021-05-21 20:36:31,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 8909 states and 33122 transitions. [2021-05-21 20:36:31,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:31,334 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:31,334 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:31,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:31,549 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:31,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1438887350, now seen corresponding path program 27 times [2021-05-21 20:36:31,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:31,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500550870] [2021-05-21 20:36:31,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:31,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500550870] [2021-05-21 20:36:31,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500550870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:31,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050901369] [2021-05-21 20:36:31,630 INFO L93 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 [2021-05-21 20:36:31,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:36:31,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:31,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:31,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:31,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050901369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:31,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:31,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:31,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045696008] [2021-05-21 20:36:31,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:31,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:31,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:31,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:31,808 INFO L87 Difference]: Start difference. First operand 8909 states and 33122 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:32,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:32,040 INFO L93 Difference]: Finished difference Result 9517 states and 34885 transitions. [2021-05-21 20:36:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:36:32,040 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:32,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:32,055 INFO L225 Difference]: With dead ends: 9517 [2021-05-21 20:36:32,055 INFO L226 Difference]: Without dead ends: 9477 [2021-05-21 20:36:32,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:36:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-05-21 20:36:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 9103. [2021-05-21 20:36:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9103 states, 9102 states have (on average 3.707426939134256) internal successors, (33745), 9102 states have internal predecessors, (33745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9103 states to 9103 states and 33745 transitions. [2021-05-21 20:36:32,283 INFO L78 Accepts]: Start accepts. Automaton has 9103 states and 33745 transitions. Word has length 27 [2021-05-21 20:36:32,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:32,283 INFO L482 AbstractCegarLoop]: Abstraction has 9103 states and 33745 transitions. [2021-05-21 20:36:32,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 9103 states and 33745 transitions. [2021-05-21 20:36:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:32,298 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:32,298 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:32,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 20:36:32,498 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:32,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1060302908, now seen corresponding path program 28 times [2021-05-21 20:36:32,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:32,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489723297] [2021-05-21 20:36:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:32,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:32,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489723297] [2021-05-21 20:36:32,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489723297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:32,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40916110] [2021-05-21 20:36:32,579 INFO L93 rtionOrderModulation]: Changing 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 [2021-05-21 20:36:32,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:32,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:32,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:32,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:32,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40916110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:32,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:32,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:32,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463197189] [2021-05-21 20:36:32,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:32,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:32,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:32,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:32,786 INFO L87 Difference]: Start difference. First operand 9103 states and 33745 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:33,069 INFO L93 Difference]: Finished difference Result 9247 states and 34135 transitions. [2021-05-21 20:36:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:36:33,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:33,085 INFO L225 Difference]: With dead ends: 9247 [2021-05-21 20:36:33,085 INFO L226 Difference]: Without dead ends: 9219 [2021-05-21 20:36:33,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:36:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-05-21 20:36:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 9136. [2021-05-21 20:36:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9136 states, 9135 states have (on average 3.7056376573617955) internal successors, (33851), 9135 states have internal predecessors, (33851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9136 states to 9136 states and 33851 transitions. [2021-05-21 20:36:33,224 INFO L78 Accepts]: Start accepts. Automaton has 9136 states and 33851 transitions. Word has length 27 [2021-05-21 20:36:33,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:33,224 INFO L482 AbstractCegarLoop]: Abstraction has 9136 states and 33851 transitions. [2021-05-21 20:36:33,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:33,224 INFO L276 IsEmpty]: Start isEmpty. Operand 9136 states and 33851 transitions. [2021-05-21 20:36:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:33,240 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:33,240 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:33,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:33,441 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1053682256, now seen corresponding path program 29 times [2021-05-21 20:36:33,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:33,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613555270] [2021-05-21 20:36:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:33,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:33,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613555270] [2021-05-21 20:36:33,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613555270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:33,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778220540] [2021-05-21 20:36:33,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:33,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:36:33,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:33,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:33,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778220540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:33,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:33,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:33,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742153860] [2021-05-21 20:36:33,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:33,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:33,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:33,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:33,801 INFO L87 Difference]: Start difference. First operand 9136 states and 33851 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:34,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:34,079 INFO L93 Difference]: Finished difference Result 9354 states and 34405 transitions. [2021-05-21 20:36:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:34,079 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:34,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:34,099 INFO L225 Difference]: With dead ends: 9354 [2021-05-21 20:36:34,100 INFO L226 Difference]: Without dead ends: 9280 [2021-05-21 20:36:34,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:36:34,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9280 states. [2021-05-21 20:36:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9280 to 9194. [2021-05-21 20:36:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.7022734689437615) internal successors, (34035), 9193 states have internal predecessors, (34035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 34035 transitions. [2021-05-21 20:36:34,249 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 34035 transitions. Word has length 27 [2021-05-21 20:36:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:34,249 INFO L482 AbstractCegarLoop]: Abstraction has 9194 states and 34035 transitions. [2021-05-21 20:36:34,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 34035 transitions. [2021-05-21 20:36:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:34,265 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:34,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:34,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 20:36:34,481 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1258931828, now seen corresponding path program 30 times [2021-05-21 20:36:34,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:34,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620339302] [2021-05-21 20:36:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:34,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:34,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620339302] [2021-05-21 20:36:34,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620339302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:34,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890980216] [2021-05-21 20:36:34,554 INFO L93 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 [2021-05-21 20:36:34,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:36:34,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:34,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:34,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:34,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890980216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:34,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:34,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:34,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613918250] [2021-05-21 20:36:34,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:34,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:34,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:34,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:34,735 INFO L87 Difference]: Start difference. First operand 9194 states and 34035 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:34,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:34,995 INFO L93 Difference]: Finished difference Result 9533 states and 34982 transitions. [2021-05-21 20:36:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:34,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:34,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:35,012 INFO L225 Difference]: With dead ends: 9533 [2021-05-21 20:36:35,013 INFO L226 Difference]: Without dead ends: 9420 [2021-05-21 20:36:35,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:36:35,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2021-05-21 20:36:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9274. [2021-05-21 20:36:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 3.6988029763830474) internal successors, (34299), 9273 states have internal predecessors, (34299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 34299 transitions. [2021-05-21 20:36:35,164 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 34299 transitions. Word has length 27 [2021-05-21 20:36:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:35,164 INFO L482 AbstractCegarLoop]: Abstraction has 9274 states and 34299 transitions. [2021-05-21 20:36:35,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 34299 transitions. [2021-05-21 20:36:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:35,181 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:35,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:35,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 20:36:35,403 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:35,403 INFO L82 PathProgramCache]: Analyzing trace with hash -17021312, now seen corresponding path program 31 times [2021-05-21 20:36:35,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:35,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050015699] [2021-05-21 20:36:35,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:35,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050015699] [2021-05-21 20:36:35,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050015699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966279281] [2021-05-21 20:36:35,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:35,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:35,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:35,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966279281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:35,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:35,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:35,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069854363] [2021-05-21 20:36:35,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:35,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:35,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:35,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:35,680 INFO L87 Difference]: Start difference. First operand 9274 states and 34299 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:35,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:35,980 INFO L93 Difference]: Finished difference Result 9439 states and 34788 transitions. [2021-05-21 20:36:35,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:36:35,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:35,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:35,996 INFO L225 Difference]: With dead ends: 9439 [2021-05-21 20:36:35,996 INFO L226 Difference]: Without dead ends: 9424 [2021-05-21 20:36:35,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:36:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9424 states. [2021-05-21 20:36:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9424 to 9304. [2021-05-21 20:36:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9304 states, 9303 states have (on average 3.6990218209179835) internal successors, (34412), 9303 states have internal predecessors, (34412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9304 states to 9304 states and 34412 transitions. [2021-05-21 20:36:36,191 INFO L78 Accepts]: Start accepts. Automaton has 9304 states and 34412 transitions. Word has length 27 [2021-05-21 20:36:36,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:36,191 INFO L482 AbstractCegarLoop]: Abstraction has 9304 states and 34412 transitions. [2021-05-21 20:36:36,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 9304 states and 34412 transitions. [2021-05-21 20:36:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:36,203 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:36,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:36,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 20:36:36,404 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:36,405 INFO L82 PathProgramCache]: Analyzing trace with hash -533712016, now seen corresponding path program 32 times [2021-05-21 20:36:36,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:36,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778817704] [2021-05-21 20:36:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:36,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:36,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778817704] [2021-05-21 20:36:36,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778817704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:36,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62478404] [2021-05-21 20:36:36,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:36,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:36,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:36,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:36,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:36,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62478404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:36,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:36,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:36,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997172914] [2021-05-21 20:36:36,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:36,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:36,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:36,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:36,652 INFO L87 Difference]: Start difference. First operand 9304 states and 34412 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:36,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:36,948 INFO L93 Difference]: Finished difference Result 9649 states and 35346 transitions. [2021-05-21 20:36:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:36,948 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:36,965 INFO L225 Difference]: With dead ends: 9649 [2021-05-21 20:36:36,965 INFO L226 Difference]: Without dead ends: 9561 [2021-05-21 20:36:36,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:36:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9561 states. [2021-05-21 20:36:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9561 to 9395. [2021-05-21 20:36:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 3.6943793911007026) internal successors, (34705), 9394 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 34705 transitions. [2021-05-21 20:36:37,094 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 34705 transitions. Word has length 27 [2021-05-21 20:36:37,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:37,094 INFO L482 AbstractCegarLoop]: Abstraction has 9395 states and 34705 transitions. [2021-05-21 20:36:37,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 34705 transitions. [2021-05-21 20:36:37,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:37,107 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:37,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:37,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-21 20:36:37,308 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:37,308 INFO L82 PathProgramCache]: Analyzing trace with hash -339028684, now seen corresponding path program 33 times [2021-05-21 20:36:37,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:37,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312593678] [2021-05-21 20:36:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:37,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:37,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312593678] [2021-05-21 20:36:37,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312593678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:37,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442320194] [2021-05-21 20:36:37,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:37,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:36:37,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:37,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:37,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:37,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442320194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:37,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:37,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:37,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298105623] [2021-05-21 20:36:37,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:37,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:37,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:37,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:37,562 INFO L87 Difference]: Start difference. First operand 9395 states and 34705 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:37,809 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-21 20:36:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:37,927 INFO L93 Difference]: Finished difference Result 9931 states and 36232 transitions. [2021-05-21 20:36:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:37,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:37,945 INFO L225 Difference]: With dead ends: 9931 [2021-05-21 20:36:37,945 INFO L226 Difference]: Without dead ends: 9855 [2021-05-21 20:36:37,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:36:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2021-05-21 20:36:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 9522. [2021-05-21 20:36:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9522 states, 9521 states have (on average 3.6922592164688584) internal successors, (35154), 9521 states have internal predecessors, (35154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9522 states to 9522 states and 35154 transitions. [2021-05-21 20:36:38,075 INFO L78 Accepts]: Start accepts. Automaton has 9522 states and 35154 transitions. Word has length 27 [2021-05-21 20:36:38,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:38,075 INFO L482 AbstractCegarLoop]: Abstraction has 9522 states and 35154 transitions. [2021-05-21 20:36:38,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states and 35154 transitions. [2021-05-21 20:36:38,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:38,088 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:38,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:38,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:38,289 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:38,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:38,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1349589500, now seen corresponding path program 34 times [2021-05-21 20:36:38,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:38,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483973180] [2021-05-21 20:36:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:38,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:38,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483973180] [2021-05-21 20:36:38,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483973180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:38,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349627413] [2021-05-21 20:36:38,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:38,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:38,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:38,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349627413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:38,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:38,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:36:38,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326627382] [2021-05-21 20:36:38,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:36:38,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:38,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:36:38,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:38,534 INFO L87 Difference]: Start difference. First operand 9522 states and 35154 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:38,774 INFO L93 Difference]: Finished difference Result 9863 states and 36097 transitions. [2021-05-21 20:36:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:38,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:36:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:38,796 INFO L225 Difference]: With dead ends: 9863 [2021-05-21 20:36:38,796 INFO L226 Difference]: Without dead ends: 9764 [2021-05-21 20:36:38,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:36:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9764 states. [2021-05-21 20:36:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9764 to 9594. [2021-05-21 20:36:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9594 states, 9593 states have (on average 3.6910247055144376) internal successors, (35408), 9593 states have internal predecessors, (35408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9594 states to 9594 states and 35408 transitions. [2021-05-21 20:36:38,930 INFO L78 Accepts]: Start accepts. Automaton has 9594 states and 35408 transitions. Word has length 27 [2021-05-21 20:36:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:38,931 INFO L482 AbstractCegarLoop]: Abstraction has 9594 states and 35408 transitions. [2021-05-21 20:36:38,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 9594 states and 35408 transitions. [2021-05-21 20:36:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:38,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:38,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:39,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-21 20:36:39,145 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:39,145 INFO L82 PathProgramCache]: Analyzing trace with hash 193536128, now seen corresponding path program 35 times [2021-05-21 20:36:39,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:39,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196690145] [2021-05-21 20:36:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:39,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:39,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196690145] [2021-05-21 20:36:39,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196690145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:39,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299188285] [2021-05-21 20:36:39,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:39,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:36:39,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:39,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:39,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:39,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299188285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:39,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:39,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:36:39,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771122580] [2021-05-21 20:36:39,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:36:39,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:36:39,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:39,470 INFO L87 Difference]: Start difference. First operand 9594 states and 35408 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:39,704 INFO L93 Difference]: Finished difference Result 10085 states and 36794 transitions. [2021-05-21 20:36:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:39,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:36:39,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:39,729 INFO L225 Difference]: With dead ends: 10085 [2021-05-21 20:36:39,729 INFO L226 Difference]: Without dead ends: 10009 [2021-05-21 20:36:39,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:36:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10009 states. [2021-05-21 20:36:39,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10009 to 9667. [2021-05-21 20:36:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9667 states, 9666 states have (on average 3.6887026691495963) internal successors, (35655), 9666 states have internal predecessors, (35655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9667 states to 9667 states and 35655 transitions. [2021-05-21 20:36:39,916 INFO L78 Accepts]: Start accepts. Automaton has 9667 states and 35655 transitions. Word has length 27 [2021-05-21 20:36:39,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:39,916 INFO L482 AbstractCegarLoop]: Abstraction has 9667 states and 35655 transitions. [2021-05-21 20:36:39,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:39,916 INFO L276 IsEmpty]: Start isEmpty. Operand 9667 states and 35655 transitions. [2021-05-21 20:36:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:39,933 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:39,933 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:40,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-21 20:36:40,155 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:40,155 INFO L82 PathProgramCache]: Analyzing trace with hash -143606020, now seen corresponding path program 36 times [2021-05-21 20:36:40,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:40,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441025019] [2021-05-21 20:36:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:40,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:40,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441025019] [2021-05-21 20:36:40,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441025019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:40,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882733778] [2021-05-21 20:36:40,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:40,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:36:40,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:40,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:40,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:40,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882733778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:40,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:40,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:40,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825947450] [2021-05-21 20:36:40,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:40,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:40,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:40,372 INFO L87 Difference]: Start difference. First operand 9667 states and 35655 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:40,545 INFO L93 Difference]: Finished difference Result 10306 states and 37504 transitions. [2021-05-21 20:36:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:36:40,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:40,563 INFO L225 Difference]: With dead ends: 10306 [2021-05-21 20:36:40,563 INFO L226 Difference]: Without dead ends: 10170 [2021-05-21 20:36:40,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:36:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-05-21 20:36:40,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 9815. [2021-05-21 20:36:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9815 states, 9814 states have (on average 3.68830242510699) internal successors, (36197), 9814 states have internal predecessors, (36197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9815 states to 9815 states and 36197 transitions. [2021-05-21 20:36:40,705 INFO L78 Accepts]: Start accepts. Automaton has 9815 states and 36197 transitions. Word has length 27 [2021-05-21 20:36:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:40,705 INFO L482 AbstractCegarLoop]: Abstraction has 9815 states and 36197 transitions. [2021-05-21 20:36:40,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9815 states and 36197 transitions. [2021-05-21 20:36:40,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:40,718 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:40,718 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:40,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:40,919 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:40,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:40,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2109020860, now seen corresponding path program 37 times [2021-05-21 20:36:40,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:40,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557469183] [2021-05-21 20:36:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:40,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:40,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557469183] [2021-05-21 20:36:40,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557469183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:40,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879473799] [2021-05-21 20:36:40,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:41,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:41,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879473799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:41,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:41,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:36:41,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621445241] [2021-05-21 20:36:41,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:36:41,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:41,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:36:41,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:41,256 INFO L87 Difference]: Start difference. First operand 9815 states and 36197 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:41,562 INFO L93 Difference]: Finished difference Result 10112 states and 36984 transitions. [2021-05-21 20:36:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:41,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:36:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:41,585 INFO L225 Difference]: With dead ends: 10112 [2021-05-21 20:36:41,585 INFO L226 Difference]: Without dead ends: 10046 [2021-05-21 20:36:41,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:36:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2021-05-21 20:36:41,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 9840. [2021-05-21 20:36:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 3.6888911474743367) internal successors, (36295), 9839 states have internal predecessors, (36295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 36295 transitions. [2021-05-21 20:36:41,792 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 36295 transitions. Word has length 27 [2021-05-21 20:36:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:41,792 INFO L482 AbstractCegarLoop]: Abstraction has 9840 states and 36295 transitions. [2021-05-21 20:36:41,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 36295 transitions. [2021-05-21 20:36:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:41,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:41,810 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:42,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 20:36:42,032 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1641622004, now seen corresponding path program 38 times [2021-05-21 20:36:42,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:42,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536429048] [2021-05-21 20:36:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:42,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:42,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536429048] [2021-05-21 20:36:42,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536429048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:42,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853550859] [2021-05-21 20:36:42,096 INFO L93 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 [2021-05-21 20:36:42,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:42,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:42,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:42,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:42,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853550859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:42,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:42,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:36:42,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799003230] [2021-05-21 20:36:42,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:36:42,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:42,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:36:42,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:42,288 INFO L87 Difference]: Start difference. First operand 9840 states and 36295 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:42,484 INFO L93 Difference]: Finished difference Result 10217 states and 37368 transitions. [2021-05-21 20:36:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:42,484 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:36:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:42,502 INFO L225 Difference]: With dead ends: 10217 [2021-05-21 20:36:42,502 INFO L226 Difference]: Without dead ends: 10187 [2021-05-21 20:36:42,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:36:42,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10187 states. [2021-05-21 20:36:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10187 to 9872. [2021-05-21 20:36:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9872 states, 9871 states have (on average 3.690102319927059) internal successors, (36425), 9871 states have internal predecessors, (36425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:42,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9872 states to 9872 states and 36425 transitions. [2021-05-21 20:36:42,662 INFO L78 Accepts]: Start accepts. Automaton has 9872 states and 36425 transitions. Word has length 27 [2021-05-21 20:36:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:42,662 INFO L482 AbstractCegarLoop]: Abstraction has 9872 states and 36425 transitions. [2021-05-21 20:36:42,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:42,663 INFO L276 IsEmpty]: Start isEmpty. Operand 9872 states and 36425 transitions. [2021-05-21 20:36:42,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:42,676 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:42,676 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:42,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:42,876 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:42,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:42,876 INFO L82 PathProgramCache]: Analyzing trace with hash -776405308, now seen corresponding path program 39 times [2021-05-21 20:36:42,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:42,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942999929] [2021-05-21 20:36:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:36:42,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:42,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942999929] [2021-05-21 20:36:42,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942999929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:42,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703408964] [2021-05-21 20:36:42,942 INFO L93 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 [2021-05-21 20:36:42,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:36:42,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:42,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:42,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:43,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703408964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:43,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:43,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:36:43,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527380292] [2021-05-21 20:36:43,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:36:43,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:43,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:36:43,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:43,157 INFO L87 Difference]: Start difference. First operand 9872 states and 36425 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:43,360 INFO L93 Difference]: Finished difference Result 10876 states and 39384 transitions. [2021-05-21 20:36:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:36:43,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:36:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:43,381 INFO L225 Difference]: With dead ends: 10876 [2021-05-21 20:36:43,381 INFO L226 Difference]: Without dead ends: 10826 [2021-05-21 20:36:43,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:36:43,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10826 states. [2021-05-21 20:36:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10826 to 10058. [2021-05-21 20:36:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10058 states, 10057 states have (on average 3.69424281594909) internal successors, (37153), 10057 states have internal predecessors, (37153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10058 states to 10058 states and 37153 transitions. [2021-05-21 20:36:43,531 INFO L78 Accepts]: Start accepts. Automaton has 10058 states and 37153 transitions. Word has length 27 [2021-05-21 20:36:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:43,531 INFO L482 AbstractCegarLoop]: Abstraction has 10058 states and 37153 transitions. [2021-05-21 20:36:43,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 10058 states and 37153 transitions. [2021-05-21 20:36:43,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:43,545 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:43,545 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:43,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-21 20:36:43,745 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:43,746 INFO L82 PathProgramCache]: Analyzing trace with hash 288417660, now seen corresponding path program 40 times [2021-05-21 20:36:43,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:43,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457593687] [2021-05-21 20:36:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:43,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:43,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457593687] [2021-05-21 20:36:43,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457593687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:43,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725041133] [2021-05-21 20:36:43,799 INFO L93 rtionOrderModulation]: Changing 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 [2021-05-21 20:36:43,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:43,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:43,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:43,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725041133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:43,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:43,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:36:43,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774859193] [2021-05-21 20:36:43,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:36:43,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:43,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:36:43,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:43,962 INFO L87 Difference]: Start difference. First operand 10058 states and 37153 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:44,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:44,183 INFO L93 Difference]: Finished difference Result 10555 states and 38575 transitions. [2021-05-21 20:36:44,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:36:44,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:36:44,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:44,202 INFO L225 Difference]: With dead ends: 10555 [2021-05-21 20:36:44,202 INFO L226 Difference]: Without dead ends: 10525 [2021-05-21 20:36:44,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:36:44,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10525 states. [2021-05-21 20:36:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10525 to 10155. [2021-05-21 20:36:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10155 states, 10154 states have (on average 3.6938152452235573) internal successors, (37507), 10154 states have internal predecessors, (37507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10155 states to 10155 states and 37507 transitions. [2021-05-21 20:36:44,340 INFO L78 Accepts]: Start accepts. Automaton has 10155 states and 37507 transitions. Word has length 27 [2021-05-21 20:36:44,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:44,340 INFO L482 AbstractCegarLoop]: Abstraction has 10155 states and 37507 transitions. [2021-05-21 20:36:44,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:44,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10155 states and 37507 transitions. [2021-05-21 20:36:44,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:44,354 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:44,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:44,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 20:36:44,554 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:44,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1717656832, now seen corresponding path program 41 times [2021-05-21 20:36:44,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:44,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518509380] [2021-05-21 20:36:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:44,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:44,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518509380] [2021-05-21 20:36:44,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518509380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:44,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277571523] [2021-05-21 20:36:44,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:44,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:36:44,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:44,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:44,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:44,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277571523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:44,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:44,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:36:44,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840828412] [2021-05-21 20:36:44,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:36:44,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:44,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:36:44,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:44,868 INFO L87 Difference]: Start difference. First operand 10155 states and 37507 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:45,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:45,042 INFO L93 Difference]: Finished difference Result 10625 states and 38849 transitions. [2021-05-21 20:36:45,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:36:45,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:36:45,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:45,059 INFO L225 Difference]: With dead ends: 10625 [2021-05-21 20:36:45,060 INFO L226 Difference]: Without dead ends: 10529 [2021-05-21 20:36:45,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:36:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10529 states. [2021-05-21 20:36:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10529 to 10297. [2021-05-21 20:36:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10297 states, 10296 states have (on average 3.6916278166278165) internal successors, (38009), 10296 states have internal predecessors, (38009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10297 states to 10297 states and 38009 transitions. [2021-05-21 20:36:45,196 INFO L78 Accepts]: Start accepts. Automaton has 10297 states and 38009 transitions. Word has length 27 [2021-05-21 20:36:45,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:45,196 INFO L482 AbstractCegarLoop]: Abstraction has 10297 states and 38009 transitions. [2021-05-21 20:36:45,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand 10297 states and 38009 transitions. [2021-05-21 20:36:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:45,210 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:45,210 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:45,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-21 20:36:45,410 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:45,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:45,411 INFO L82 PathProgramCache]: Analyzing trace with hash 795869124, now seen corresponding path program 42 times [2021-05-21 20:36:45,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:45,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895024318] [2021-05-21 20:36:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:45,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:45,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895024318] [2021-05-21 20:36:45,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895024318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:45,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534393358] [2021-05-21 20:36:45,484 INFO L93 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 [2021-05-21 20:36:45,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:36:45,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:45,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534393358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:45,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:45,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:45,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088224679] [2021-05-21 20:36:45,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:45,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:45,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:45,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:45,691 INFO L87 Difference]: Start difference. First operand 10297 states and 38009 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:45,903 INFO L93 Difference]: Finished difference Result 11674 states and 42186 transitions. [2021-05-21 20:36:45,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:36:45,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:45,923 INFO L225 Difference]: With dead ends: 11674 [2021-05-21 20:36:45,923 INFO L226 Difference]: Without dead ends: 11640 [2021-05-21 20:36:45,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:36:45,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11640 states. [2021-05-21 20:36:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11640 to 10557. [2021-05-21 20:36:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10557 states, 10556 states have (on average 3.6996968548692686) internal successors, (39054), 10556 states have internal predecessors, (39054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10557 states to 10557 states and 39054 transitions. [2021-05-21 20:36:46,078 INFO L78 Accepts]: Start accepts. Automaton has 10557 states and 39054 transitions. Word has length 27 [2021-05-21 20:36:46,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:46,078 INFO L482 AbstractCegarLoop]: Abstraction has 10557 states and 39054 transitions. [2021-05-21 20:36:46,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand 10557 states and 39054 transitions. [2021-05-21 20:36:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:46,093 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:46,093 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:46,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-05-21 20:36:46,293 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:46,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1324830332, now seen corresponding path program 43 times [2021-05-21 20:36:46,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:46,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787366159] [2021-05-21 20:36:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:46,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:46,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787366159] [2021-05-21 20:36:46,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787366159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:46,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698892478] [2021-05-21 20:36:46,393 INFO 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 [2021-05-21 20:36:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:46,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:46,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:46,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698892478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:46,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:46,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:46,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608001342] [2021-05-21 20:36:46,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:46,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:46,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:46,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:46,588 INFO L87 Difference]: Start difference. First operand 10557 states and 39054 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:46,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:46,812 INFO L93 Difference]: Finished difference Result 10738 states and 39591 transitions. [2021-05-21 20:36:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:36:46,813 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:46,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:46,830 INFO L225 Difference]: With dead ends: 10738 [2021-05-21 20:36:46,830 INFO L226 Difference]: Without dead ends: 10723 [2021-05-21 20:36:46,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:36:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10723 states. [2021-05-21 20:36:46,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10723 to 10592. [2021-05-21 20:36:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.6990841280332356) internal successors, (39177), 10591 states have internal predecessors, (39177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 39177 transitions. [2021-05-21 20:36:46,965 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 39177 transitions. Word has length 27 [2021-05-21 20:36:46,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:46,965 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 39177 transitions. [2021-05-21 20:36:46,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:46,965 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 39177 transitions. [2021-05-21 20:36:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:46,979 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:46,979 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:47,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:47,179 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:47,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:47,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1318209680, now seen corresponding path program 44 times [2021-05-21 20:36:47,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:47,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645647677] [2021-05-21 20:36:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:47,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:47,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645647677] [2021-05-21 20:36:47,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645647677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:47,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926692738] [2021-05-21 20:36:47,270 INFO L93 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 [2021-05-21 20:36:47,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:47,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:47,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:47,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:47,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926692738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:47,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:47,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:47,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598102779] [2021-05-21 20:36:47,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:47,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:47,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:47,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:47,458 INFO L87 Difference]: Start difference. First operand 10592 states and 39177 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:47,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:47,729 INFO L93 Difference]: Finished difference Result 11042 states and 40414 transitions. [2021-05-21 20:36:47,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:47,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:47,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:47,747 INFO L225 Difference]: With dead ends: 11042 [2021-05-21 20:36:47,747 INFO L226 Difference]: Without dead ends: 10965 [2021-05-21 20:36:47,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:36:47,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10965 states. [2021-05-21 20:36:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10965 to 10686. [2021-05-21 20:36:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10686 states, 10685 states have (on average 3.6966775854000935) internal successors, (39499), 10685 states have internal predecessors, (39499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10686 states to 10686 states and 39499 transitions. [2021-05-21 20:36:47,973 INFO L78 Accepts]: Start accepts. Automaton has 10686 states and 39499 transitions. Word has length 27 [2021-05-21 20:36:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:47,974 INFO L482 AbstractCegarLoop]: Abstraction has 10686 states and 39499 transitions. [2021-05-21 20:36:47,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 10686 states and 39499 transitions. [2021-05-21 20:36:47,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:47,988 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:47,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:48,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-21 20:36:48,189 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:48,189 INFO L82 PathProgramCache]: Analyzing trace with hash 994404404, now seen corresponding path program 45 times [2021-05-21 20:36:48,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:48,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793728023] [2021-05-21 20:36:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:48,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:48,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793728023] [2021-05-21 20:36:48,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793728023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:48,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946388182] [2021-05-21 20:36:48,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:48,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:36:48,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:48,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:48,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:48,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946388182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:48,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:48,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:48,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592729582] [2021-05-21 20:36:48,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:48,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:48,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:48,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:48,462 INFO L87 Difference]: Start difference. First operand 10686 states and 39499 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:48,686 INFO L93 Difference]: Finished difference Result 11185 states and 40920 transitions. [2021-05-21 20:36:48,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:48,686 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:48,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:48,706 INFO L225 Difference]: With dead ends: 11185 [2021-05-21 20:36:48,706 INFO L226 Difference]: Without dead ends: 11145 [2021-05-21 20:36:48,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:36:48,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11145 states. [2021-05-21 20:36:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11145 to 10743. [2021-05-21 20:36:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10743 states, 10742 states have (on average 3.6983801899087694) internal successors, (39728), 10742 states have internal predecessors, (39728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10743 states to 10743 states and 39728 transitions. [2021-05-21 20:36:48,857 INFO L78 Accepts]: Start accepts. Automaton has 10743 states and 39728 transitions. Word has length 27 [2021-05-21 20:36:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:48,858 INFO L482 AbstractCegarLoop]: Abstraction has 10743 states and 39728 transitions. [2021-05-21 20:36:48,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 10743 states and 39728 transitions. [2021-05-21 20:36:48,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:48,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:48,871 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:49,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:49,072 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:49,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:49,072 INFO L82 PathProgramCache]: Analyzing trace with hash -281548736, now seen corresponding path program 46 times [2021-05-21 20:36:49,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:49,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053267975] [2021-05-21 20:36:49,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:49,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:49,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053267975] [2021-05-21 20:36:49,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053267975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:49,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024380218] [2021-05-21 20:36:49,138 INFO L93 rtionOrderModulation]: Changing 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 [2021-05-21 20:36:49,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:49,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:49,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:49,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:49,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024380218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:49,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:49,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:49,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499511705] [2021-05-21 20:36:49,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:49,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:49,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:49,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:49,321 INFO L87 Difference]: Start difference. First operand 10743 states and 39728 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:49,578 INFO L93 Difference]: Finished difference Result 10899 states and 40153 transitions. [2021-05-21 20:36:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:36:49,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:49,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:49,596 INFO L225 Difference]: With dead ends: 10899 [2021-05-21 20:36:49,596 INFO L226 Difference]: Without dead ends: 10871 [2021-05-21 20:36:49,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:36:49,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2021-05-21 20:36:49,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 10760. [2021-05-21 20:36:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10760 states, 10759 states have (on average 3.698299098429222) internal successors, (39790), 10759 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10760 states to 10760 states and 39790 transitions. [2021-05-21 20:36:49,739 INFO L78 Accepts]: Start accepts. Automaton has 10760 states and 39790 transitions. Word has length 27 [2021-05-21 20:36:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:49,739 INFO L482 AbstractCegarLoop]: Abstraction has 10760 states and 39790 transitions. [2021-05-21 20:36:49,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 10760 states and 39790 transitions. [2021-05-21 20:36:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:49,754 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:49,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:49,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-21 20:36:49,955 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:49,955 INFO L82 PathProgramCache]: Analyzing trace with hash -798239440, now seen corresponding path program 47 times [2021-05-21 20:36:49,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:49,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70281264] [2021-05-21 20:36:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:50,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:50,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70281264] [2021-05-21 20:36:50,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70281264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:50,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121654465] [2021-05-21 20:36:50,020 INFO L93 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 [2021-05-21 20:36:50,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:36:50,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:50,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:50,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:50,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121654465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:50,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:50,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:50,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408123865] [2021-05-21 20:36:50,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:50,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:50,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:50,172 INFO L87 Difference]: Start difference. First operand 10760 states and 39790 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:50,352 INFO L93 Difference]: Finished difference Result 11018 states and 40428 transitions. [2021-05-21 20:36:50,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:50,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:50,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:50,375 INFO L225 Difference]: With dead ends: 11018 [2021-05-21 20:36:50,375 INFO L226 Difference]: Without dead ends: 10908 [2021-05-21 20:36:50,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:36:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10908 states. [2021-05-21 20:36:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10908 to 10812. [2021-05-21 20:36:50,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10812 states, 10811 states have (on average 3.696790306169642) internal successors, (39966), 10811 states have internal predecessors, (39966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10812 states to 10812 states and 39966 transitions. [2021-05-21 20:36:50,520 INFO L78 Accepts]: Start accepts. Automaton has 10812 states and 39966 transitions. Word has length 27 [2021-05-21 20:36:50,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:50,520 INFO L482 AbstractCegarLoop]: Abstraction has 10812 states and 39966 transitions. [2021-05-21 20:36:50,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 10812 states and 39966 transitions. [2021-05-21 20:36:50,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:50,534 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:50,534 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:50,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-21 20:36:50,734 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:50,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:50,734 INFO L82 PathProgramCache]: Analyzing trace with hash -603556108, now seen corresponding path program 48 times [2021-05-21 20:36:50,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:50,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131395434] [2021-05-21 20:36:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:50,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:50,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131395434] [2021-05-21 20:36:50,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131395434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:50,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629427549] [2021-05-21 20:36:50,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:50,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:36:50,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:50,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:50,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:51,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629427549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:51,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:51,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:51,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40504990] [2021-05-21 20:36:51,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:51,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:51,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:51,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:51,004 INFO L87 Difference]: Start difference. First operand 10812 states and 39966 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:51,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:51,264 INFO L93 Difference]: Finished difference Result 11294 states and 41303 transitions. [2021-05-21 20:36:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:51,265 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:51,290 INFO L225 Difference]: With dead ends: 11294 [2021-05-21 20:36:51,291 INFO L226 Difference]: Without dead ends: 11195 [2021-05-21 20:36:51,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:36:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11195 states. [2021-05-21 20:36:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11195 to 10917. [2021-05-21 20:36:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10917 states, 10916 states have (on average 3.6943019421033347) internal successors, (40327), 10916 states have internal predecessors, (40327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10917 states to 10917 states and 40327 transitions. [2021-05-21 20:36:51,484 INFO L78 Accepts]: Start accepts. Automaton has 10917 states and 40327 transitions. Word has length 27 [2021-05-21 20:36:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:51,484 INFO L482 AbstractCegarLoop]: Abstraction has 10917 states and 40327 transitions. [2021-05-21 20:36:51,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:51,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10917 states and 40327 transitions. [2021-05-21 20:36:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:51,499 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:51,499 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:51,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:51,699 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:51,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:51,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1085062076, now seen corresponding path program 49 times [2021-05-21 20:36:51,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:51,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079158253] [2021-05-21 20:36:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:51,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:51,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079158253] [2021-05-21 20:36:51,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079158253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:51,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666647525] [2021-05-21 20:36:51,767 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 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 [2021-05-21 20:36:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:51,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:51,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:51,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666647525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:51,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:51,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:36:51,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574564737] [2021-05-21 20:36:51,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:36:51,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:51,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:36:51,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:51,945 INFO L87 Difference]: Start difference. First operand 10917 states and 40327 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:52,167 INFO L93 Difference]: Finished difference Result 11367 states and 41606 transitions. [2021-05-21 20:36:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:52,167 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:36:52,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:52,185 INFO L225 Difference]: With dead ends: 11367 [2021-05-21 20:36:52,186 INFO L226 Difference]: Without dead ends: 11337 [2021-05-21 20:36:52,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2021-05-21 20:36:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 10979. [2021-05-21 20:36:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10979 states, 10978 states have (on average 3.69484423392239) internal successors, (40562), 10978 states have internal predecessors, (40562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10979 states to 10979 states and 40562 transitions. [2021-05-21 20:36:52,331 INFO L78 Accepts]: Start accepts. Automaton has 10979 states and 40562 transitions. Word has length 27 [2021-05-21 20:36:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:52,331 INFO L482 AbstractCegarLoop]: Abstraction has 10979 states and 40562 transitions. [2021-05-21 20:36:52,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 10979 states and 40562 transitions. [2021-05-21 20:36:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:52,345 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:52,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:52,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-21 20:36:52,547 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:52,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:52,547 INFO L82 PathProgramCache]: Analyzing trace with hash -70991296, now seen corresponding path program 50 times [2021-05-21 20:36:52,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:52,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507706650] [2021-05-21 20:36:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:52,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:52,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507706650] [2021-05-21 20:36:52,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507706650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:52,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148023011] [2021-05-21 20:36:52,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:52,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:52,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:52,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:52,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148023011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:52,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:52,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:36:52,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375705698] [2021-05-21 20:36:52,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:36:52,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:52,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:36:52,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:52,782 INFO L87 Difference]: Start difference. First operand 10979 states and 40562 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:53,036 INFO L93 Difference]: Finished difference Result 11407 states and 41736 transitions. [2021-05-21 20:36:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:53,036 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:36:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:53,061 INFO L225 Difference]: With dead ends: 11407 [2021-05-21 20:36:53,061 INFO L226 Difference]: Without dead ends: 11315 [2021-05-21 20:36:53,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11315 states. [2021-05-21 20:36:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11315 to 11054. [2021-05-21 20:36:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11054 states, 11053 states have (on average 3.694743508549715) internal successors, (40838), 11053 states have internal predecessors, (40838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11054 states to 11054 states and 40838 transitions. [2021-05-21 20:36:53,282 INFO L78 Accepts]: Start accepts. Automaton has 11054 states and 40838 transitions. Word has length 27 [2021-05-21 20:36:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:53,282 INFO L482 AbstractCegarLoop]: Abstraction has 11054 states and 40838 transitions. [2021-05-21 20:36:53,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 11054 states and 40838 transitions. [2021-05-21 20:36:53,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:53,301 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:53,301 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:53,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-21 20:36:53,501 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash 993593664, now seen corresponding path program 51 times [2021-05-21 20:36:53,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:53,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315369022] [2021-05-21 20:36:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:53,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:53,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315369022] [2021-05-21 20:36:53,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315369022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:53,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225378619] [2021-05-21 20:36:53,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:53,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:36:53,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:53,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:53,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:53,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225378619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:53,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:53,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:53,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201871626] [2021-05-21 20:36:53,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:53,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:53,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:53,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:53,758 INFO L87 Difference]: Start difference. First operand 11054 states and 40838 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:53,984 INFO L93 Difference]: Finished difference Result 11235 states and 41375 transitions. [2021-05-21 20:36:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:36:53,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:54,003 INFO L225 Difference]: With dead ends: 11235 [2021-05-21 20:36:54,003 INFO L226 Difference]: Without dead ends: 11220 [2021-05-21 20:36:54,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:36:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11220 states. [2021-05-21 20:36:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11220 to 11078. [2021-05-21 20:36:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11078 states, 11077 states have (on average 3.6932382414011014) internal successors, (40910), 11077 states have internal predecessors, (40910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11078 states to 11078 states and 40910 transitions. [2021-05-21 20:36:54,153 INFO L78 Accepts]: Start accepts. Automaton has 11078 states and 40910 transitions. Word has length 27 [2021-05-21 20:36:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:54,153 INFO L482 AbstractCegarLoop]: Abstraction has 11078 states and 40910 transitions. [2021-05-21 20:36:54,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 11078 states and 40910 transitions. [2021-05-21 20:36:54,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:54,168 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:54,168 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:54,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-21 20:36:54,369 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:54,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:54,369 INFO L82 PathProgramCache]: Analyzing trace with hash 476902960, now seen corresponding path program 52 times [2021-05-21 20:36:54,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:54,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746111746] [2021-05-21 20:36:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:54,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:54,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746111746] [2021-05-21 20:36:54,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746111746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:54,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746334077] [2021-05-21 20:36:54,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:54,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:54,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:54,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:54,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746334077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:54,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:54,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:54,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599383628] [2021-05-21 20:36:54,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:54,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:54,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:54,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:54,590 INFO L87 Difference]: Start difference. First operand 11078 states and 40910 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:54,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:54,868 INFO L93 Difference]: Finished difference Result 11379 states and 41715 transitions. [2021-05-21 20:36:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:54,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:54,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:54,889 INFO L225 Difference]: With dead ends: 11379 [2021-05-21 20:36:54,889 INFO L226 Difference]: Without dead ends: 11313 [2021-05-21 20:36:54,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:36:54,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2021-05-21 20:36:55,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11126. [2021-05-21 20:36:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11126 states, 11125 states have (on average 3.6934831460674156) internal successors, (41090), 11125 states have internal predecessors, (41090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11126 states to 11126 states and 41090 transitions. [2021-05-21 20:36:55,090 INFO L78 Accepts]: Start accepts. Automaton has 11126 states and 41090 transitions. Word has length 27 [2021-05-21 20:36:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:55,090 INFO L482 AbstractCegarLoop]: Abstraction has 11126 states and 41090 transitions. [2021-05-21 20:36:55,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand 11126 states and 41090 transitions. [2021-05-21 20:36:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:55,107 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:55,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:55,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:55,307 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:55,308 INFO L82 PathProgramCache]: Analyzing trace with hash 671586292, now seen corresponding path program 53 times [2021-05-21 20:36:55,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:55,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790463064] [2021-05-21 20:36:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:55,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:55,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790463064] [2021-05-21 20:36:55,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790463064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:55,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653770500] [2021-05-21 20:36:55,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:55,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:36:55,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:55,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:55,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:55,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653770500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:55,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:55,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:55,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225173487] [2021-05-21 20:36:55,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:55,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:55,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:55,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:55,605 INFO L87 Difference]: Start difference. First operand 11126 states and 41090 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:55,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:55,888 INFO L93 Difference]: Finished difference Result 11510 states and 42198 transitions. [2021-05-21 20:36:55,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:55,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:55,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:55,910 INFO L225 Difference]: With dead ends: 11510 [2021-05-21 20:36:55,910 INFO L226 Difference]: Without dead ends: 11480 [2021-05-21 20:36:55,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:36:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11480 states. [2021-05-21 20:36:56,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11480 to 11156. [2021-05-21 20:36:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11156 states, 11155 states have (on average 3.696100403406544) internal successors, (41230), 11155 states have internal predecessors, (41230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 41230 transitions. [2021-05-21 20:36:56,107 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 41230 transitions. Word has length 27 [2021-05-21 20:36:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:56,107 INFO L482 AbstractCegarLoop]: Abstraction has 11156 states and 41230 transitions. [2021-05-21 20:36:56,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 41230 transitions. [2021-05-21 20:36:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:56,124 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:56,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:56,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:56,325 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:56,326 INFO L82 PathProgramCache]: Analyzing trace with hash 941151852, now seen corresponding path program 54 times [2021-05-21 20:36:56,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:56,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699414875] [2021-05-21 20:36:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:56,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:56,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699414875] [2021-05-21 20:36:56,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699414875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:56,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158264119] [2021-05-21 20:36:56,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:56,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:36:56,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:56,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:56,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:56,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158264119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:56,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:56,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:56,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452209922] [2021-05-21 20:36:56,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:56,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:56,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:56,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:56,613 INFO L87 Difference]: Start difference. First operand 11156 states and 41230 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:56,870 INFO L93 Difference]: Finished difference Result 11580 states and 42454 transitions. [2021-05-21 20:36:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:56,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:56,890 INFO L225 Difference]: With dead ends: 11580 [2021-05-21 20:36:56,890 INFO L226 Difference]: Without dead ends: 11550 [2021-05-21 20:36:56,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:36:56,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11550 states. [2021-05-21 20:36:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11550 to 11232. [2021-05-21 20:36:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 3.6960199447956548) internal successors, (41510), 11231 states have internal predecessors, (41510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:57,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 41510 transitions. [2021-05-21 20:36:57,045 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 41510 transitions. Word has length 27 [2021-05-21 20:36:57,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:57,046 INFO L482 AbstractCegarLoop]: Abstraction has 11232 states and 41510 transitions. [2021-05-21 20:36:57,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:57,046 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 41510 transitions. [2021-05-21 20:36:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:57,061 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:57,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:57,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:57,265 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:57,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:57,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1135835184, now seen corresponding path program 55 times [2021-05-21 20:36:57,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:57,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083794296] [2021-05-21 20:36:57,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:57,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:57,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083794296] [2021-05-21 20:36:57,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083794296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:57,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286504716] [2021-05-21 20:36:57,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:57,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:57,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:57,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286504716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:57,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:57,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:57,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855969436] [2021-05-21 20:36:57,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:57,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:57,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:57,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:57,530 INFO L87 Difference]: Start difference. First operand 11232 states and 41510 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:57,785 INFO L93 Difference]: Finished difference Result 11545 states and 42403 transitions. [2021-05-21 20:36:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:57,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:57,807 INFO L225 Difference]: With dead ends: 11545 [2021-05-21 20:36:57,807 INFO L226 Difference]: Without dead ends: 11507 [2021-05-21 20:36:57,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:36:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11507 states. [2021-05-21 20:36:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11507 to 11272. [2021-05-21 20:36:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 11271 states have (on average 3.6969213024576346) internal successors, (41668), 11271 states have internal predecessors, (41668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 41668 transitions. [2021-05-21 20:36:57,963 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 41668 transitions. Word has length 27 [2021-05-21 20:36:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:57,963 INFO L482 AbstractCegarLoop]: Abstraction has 11272 states and 41668 transitions. [2021-05-21 20:36:57,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:57,964 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 41668 transitions. [2021-05-21 20:36:57,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:57,980 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:57,980 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:58,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:58,180 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1936586544, now seen corresponding path program 56 times [2021-05-21 20:36:58,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:58,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680977141] [2021-05-21 20:36:58,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:58,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:58,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680977141] [2021-05-21 20:36:58,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680977141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:58,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130116452] [2021-05-21 20:36:58,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:36:58,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:58,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:58,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:58,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:58,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130116452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:58,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:58,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:58,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433692353] [2021-05-21 20:36:58,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:58,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:58,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:58,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:58,444 INFO L87 Difference]: Start difference. First operand 11272 states and 41668 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:58,716 INFO L93 Difference]: Finished difference Result 11437 states and 42157 transitions. [2021-05-21 20:36:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:36:58,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:36:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:58,736 INFO L225 Difference]: With dead ends: 11437 [2021-05-21 20:36:58,736 INFO L226 Difference]: Without dead ends: 11422 [2021-05-21 20:36:58,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:36:58,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11422 states. [2021-05-21 20:36:58,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11422 to 11302. [2021-05-21 20:36:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11302 states, 11301 states have (on average 3.6956021591009645) internal successors, (41764), 11301 states have internal predecessors, (41764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11302 states to 11302 states and 41764 transitions. [2021-05-21 20:36:58,884 INFO L78 Accepts]: Start accepts. Automaton has 11302 states and 41764 transitions. Word has length 27 [2021-05-21 20:36:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:58,885 INFO L482 AbstractCegarLoop]: Abstraction has 11302 states and 41764 transitions. [2021-05-21 20:36:58,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:36:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 11302 states and 41764 transitions. [2021-05-21 20:36:58,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:58,900 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:58,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:59,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-21 20:36:59,101 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1960365508, now seen corresponding path program 57 times [2021-05-21 20:36:59,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:59,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036475741] [2021-05-21 20:36:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:59,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:59,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036475741] [2021-05-21 20:36:59,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036475741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:59,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430311488] [2021-05-21 20:36:59,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:59,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:36:59,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:59,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:36:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:59,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430311488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:59,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:59,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:36:59,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356997833] [2021-05-21 20:36:59,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:36:59,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:59,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:36:59,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:59,402 INFO L87 Difference]: Start difference. First operand 11302 states and 41764 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:59,594 INFO L93 Difference]: Finished difference Result 11677 states and 42772 transitions. [2021-05-21 20:36:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:36:59,595 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:36:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:59,613 INFO L225 Difference]: With dead ends: 11677 [2021-05-21 20:36:59,613 INFO L226 Difference]: Without dead ends: 11625 [2021-05-21 20:36:59,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:59,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11625 states. [2021-05-21 20:36:59,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11625 to 11308. [2021-05-21 20:36:59,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11308 states, 11307 states have (on average 3.6952330414787298) internal successors, (41782), 11307 states have internal predecessors, (41782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11308 states to 11308 states and 41782 transitions. [2021-05-21 20:36:59,777 INFO L78 Accepts]: Start accepts. Automaton has 11308 states and 41782 transitions. Word has length 27 [2021-05-21 20:36:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:59,777 INFO L482 AbstractCegarLoop]: Abstraction has 11308 states and 41782 transitions. [2021-05-21 20:36:59,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:36:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 11308 states and 41782 transitions. [2021-05-21 20:36:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:36:59,797 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:59,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:00,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:00,013 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:00,013 INFO L82 PathProgramCache]: Analyzing trace with hash 352248576, now seen corresponding path program 58 times [2021-05-21 20:37:00,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:00,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259371800] [2021-05-21 20:37:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:00,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:00,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259371800] [2021-05-21 20:37:00,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259371800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:00,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666591851] [2021-05-21 20:37:00,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:00,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:37:00,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:00,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666591851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:00,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:00,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:37:00,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869930132] [2021-05-21 20:37:00,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:37:00,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:00,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:37:00,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:37:00,219 INFO L87 Difference]: Start difference. First operand 11308 states and 41782 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:00,420 INFO L93 Difference]: Finished difference Result 11704 states and 42906 transitions. [2021-05-21 20:37:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:00,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:37:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:00,439 INFO L225 Difference]: With dead ends: 11704 [2021-05-21 20:37:00,439 INFO L226 Difference]: Without dead ends: 11674 [2021-05-21 20:37:00,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2021-05-21 20:37:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 11310. [2021-05-21 20:37:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11310 states, 11309 states have (on average 3.695463789901848) internal successors, (41792), 11309 states have internal predecessors, (41792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11310 states to 11310 states and 41792 transitions. [2021-05-21 20:37:00,602 INFO L78 Accepts]: Start accepts. Automaton has 11310 states and 41792 transitions. Word has length 27 [2021-05-21 20:37:00,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:00,602 INFO L482 AbstractCegarLoop]: Abstraction has 11310 states and 41792 transitions. [2021-05-21 20:37:00,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:00,602 INFO L276 IsEmpty]: Start isEmpty. Operand 11310 states and 41792 transitions. [2021-05-21 20:37:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:00,617 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:00,617 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:00,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-21 20:37:00,818 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:00,818 INFO L82 PathProgramCache]: Analyzing trace with hash -531126336, now seen corresponding path program 59 times [2021-05-21 20:37:00,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:00,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195398493] [2021-05-21 20:37:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:00,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:00,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195398493] [2021-05-21 20:37:00,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195398493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:00,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093581943] [2021-05-21 20:37:00,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:00,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:37:00,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:00,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:00,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:01,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093581943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:01,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:01,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:37:01,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942015179] [2021-05-21 20:37:01,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:37:01,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:01,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:37:01,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:37:01,036 INFO L87 Difference]: Start difference. First operand 11310 states and 41792 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:01,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:01,201 INFO L93 Difference]: Finished difference Result 11586 states and 42494 transitions. [2021-05-21 20:37:01,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:01,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:37:01,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:01,221 INFO L225 Difference]: With dead ends: 11586 [2021-05-21 20:37:01,221 INFO L226 Difference]: Without dead ends: 11512 [2021-05-21 20:37:01,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:01,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11512 states. [2021-05-21 20:37:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11512 to 11372. [2021-05-21 20:37:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11372 states, 11371 states have (on average 3.692639169817958) internal successors, (41989), 11371 states have internal predecessors, (41989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 41989 transitions. [2021-05-21 20:37:01,380 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 41989 transitions. Word has length 27 [2021-05-21 20:37:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:01,380 INFO L482 AbstractCegarLoop]: Abstraction has 11372 states and 41989 transitions. [2021-05-21 20:37:01,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 41989 transitions. [2021-05-21 20:37:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:01,395 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:01,395 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:01,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:01,597 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:01,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:01,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1957542588, now seen corresponding path program 60 times [2021-05-21 20:37:01,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:01,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563131344] [2021-05-21 20:37:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:01,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:01,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563131344] [2021-05-21 20:37:01,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563131344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:01,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329132815] [2021-05-21 20:37:01,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:01,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:37:01,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:01,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:01,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:01,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329132815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:01,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:01,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:37:01,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511951904] [2021-05-21 20:37:01,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:37:01,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:01,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:37:01,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:37:01,830 INFO L87 Difference]: Start difference. First operand 11372 states and 41989 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:02,066 INFO L93 Difference]: Finished difference Result 11723 states and 42964 transitions. [2021-05-21 20:37:02,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:02,066 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:37:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:02,085 INFO L225 Difference]: With dead ends: 11723 [2021-05-21 20:37:02,085 INFO L226 Difference]: Without dead ends: 11685 [2021-05-21 20:37:02,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11685 states. [2021-05-21 20:37:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11685 to 11411. [2021-05-21 20:37:02,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11411 states, 11410 states have (on average 3.692900964066608) internal successors, (42136), 11410 states have internal predecessors, (42136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11411 states to 11411 states and 42136 transitions. [2021-05-21 20:37:02,236 INFO L78 Accepts]: Start accepts. Automaton has 11411 states and 42136 transitions. Word has length 27 [2021-05-21 20:37:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:02,237 INFO L482 AbstractCegarLoop]: Abstraction has 11411 states and 42136 transitions. [2021-05-21 20:37:02,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 11411 states and 42136 transitions. [2021-05-21 20:37:02,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:02,252 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:02,252 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:02,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-21 20:37:02,457 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:02,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:02,457 INFO L82 PathProgramCache]: Analyzing trace with hash -889299460, now seen corresponding path program 61 times [2021-05-21 20:37:02,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:02,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383212658] [2021-05-21 20:37:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:02,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:02,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383212658] [2021-05-21 20:37:02,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383212658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:02,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656117242] [2021-05-21 20:37:02,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:02,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:02,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:02,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656117242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:02,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:02,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:02,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801105971] [2021-05-21 20:37:02,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:02,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:02,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:02,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:02,692 INFO L87 Difference]: Start difference. First operand 11411 states and 42136 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:02,931 INFO L93 Difference]: Finished difference Result 11793 states and 43179 transitions. [2021-05-21 20:37:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:02,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:02,951 INFO L225 Difference]: With dead ends: 11793 [2021-05-21 20:37:02,951 INFO L226 Difference]: Without dead ends: 11741 [2021-05-21 20:37:02,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:37:02,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11741 states. [2021-05-21 20:37:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11741 to 11475. [2021-05-21 20:37:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11475 states, 11474 states have (on average 3.6911277671256753) internal successors, (42352), 11474 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11475 states to 11475 states and 42352 transitions. [2021-05-21 20:37:03,187 INFO L78 Accepts]: Start accepts. Automaton has 11475 states and 42352 transitions. Word has length 27 [2021-05-21 20:37:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:03,187 INFO L482 AbstractCegarLoop]: Abstraction has 11475 states and 42352 transitions. [2021-05-21 20:37:03,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 11475 states and 42352 transitions. [2021-05-21 20:37:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:03,202 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:03,202 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:03,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:03,402 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:03,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:03,403 INFO L82 PathProgramCache]: Analyzing trace with hash -421900604, now seen corresponding path program 62 times [2021-05-21 20:37:03,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:03,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279810056] [2021-05-21 20:37:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:03,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:03,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279810056] [2021-05-21 20:37:03,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279810056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:03,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295543762] [2021-05-21 20:37:03,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:03,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:03,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:03,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:03,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:03,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295543762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:03,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:03,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:03,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778369021] [2021-05-21 20:37:03,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:03,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:03,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:03,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:03,636 INFO L87 Difference]: Start difference. First operand 11475 states and 42352 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:03,818 INFO L93 Difference]: Finished difference Result 11715 states and 42996 transitions. [2021-05-21 20:37:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:03,837 INFO L225 Difference]: With dead ends: 11715 [2021-05-21 20:37:03,837 INFO L226 Difference]: Without dead ends: 11659 [2021-05-21 20:37:03,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:37:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11659 states. [2021-05-21 20:37:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11659 to 11503. [2021-05-21 20:37:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11503 states, 11502 states have (on average 3.691531907494349) internal successors, (42460), 11502 states have internal predecessors, (42460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11503 states to 11503 states and 42460 transitions. [2021-05-21 20:37:03,990 INFO L78 Accepts]: Start accepts. Automaton has 11503 states and 42460 transitions. Word has length 27 [2021-05-21 20:37:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:03,990 INFO L482 AbstractCegarLoop]: Abstraction has 11503 states and 42460 transitions. [2021-05-21 20:37:03,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:03,990 INFO L276 IsEmpty]: Start isEmpty. Operand 11503 states and 42460 transitions. [2021-05-21 20:37:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:04,006 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:04,006 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:04,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:04,206 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:04,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:04,207 INFO L82 PathProgramCache]: Analyzing trace with hash 85705924, now seen corresponding path program 63 times [2021-05-21 20:37:04,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:04,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364325323] [2021-05-21 20:37:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:04,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:04,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364325323] [2021-05-21 20:37:04,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364325323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:04,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986489479] [2021-05-21 20:37:04,285 INFO L93 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 [2021-05-21 20:37:04,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:37:04,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:04,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:04,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:04,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986489479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:04,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:04,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:04,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613092214] [2021-05-21 20:37:04,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:04,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:04,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:04,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:04,483 INFO L87 Difference]: Start difference. First operand 11503 states and 42460 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:04,737 INFO L93 Difference]: Finished difference Result 11675 states and 42930 transitions. [2021-05-21 20:37:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:37:04,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:04,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:04,763 INFO L225 Difference]: With dead ends: 11675 [2021-05-21 20:37:04,763 INFO L226 Difference]: Without dead ends: 11649 [2021-05-21 20:37:04,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 242.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:37:04,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11649 states. [2021-05-21 20:37:04,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11649 to 11510. [2021-05-21 20:37:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11510 states, 11509 states have (on average 3.6920670779390043) internal successors, (42492), 11509 states have internal predecessors, (42492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11510 states to 11510 states and 42492 transitions. [2021-05-21 20:37:04,926 INFO L78 Accepts]: Start accepts. Automaton has 11510 states and 42492 transitions. Word has length 27 [2021-05-21 20:37:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:04,926 INFO L482 AbstractCegarLoop]: Abstraction has 11510 states and 42492 transitions. [2021-05-21 20:37:04,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 11510 states and 42492 transitions. [2021-05-21 20:37:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:04,942 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:04,942 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:05,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-05-21 20:37:05,143 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:05,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1402020932, now seen corresponding path program 64 times [2021-05-21 20:37:05,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:05,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781151429] [2021-05-21 20:37:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:05,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:05,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781151429] [2021-05-21 20:37:05,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781151429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:05,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910725211] [2021-05-21 20:37:05,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:37:05,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:37:05,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:05,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:05,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:05,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910725211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:05,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:05,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:05,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209975183] [2021-05-21 20:37:05,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:05,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:05,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:05,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:05,385 INFO L87 Difference]: Start difference. First operand 11510 states and 42492 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:05,715 INFO L93 Difference]: Finished difference Result 12092 states and 44144 transitions. [2021-05-21 20:37:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:05,716 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:05,736 INFO L225 Difference]: With dead ends: 12092 [2021-05-21 20:37:05,736 INFO L226 Difference]: Without dead ends: 12062 [2021-05-21 20:37:05,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:37:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12062 states. [2021-05-21 20:37:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12062 to 11576. [2021-05-21 20:37:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11576 states, 11575 states have (on average 3.691317494600432) internal successors, (42727), 11575 states have internal predecessors, (42727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11576 states to 11576 states and 42727 transitions. [2021-05-21 20:37:05,903 INFO L78 Accepts]: Start accepts. Automaton has 11576 states and 42727 transitions. Word has length 27 [2021-05-21 20:37:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:05,903 INFO L482 AbstractCegarLoop]: Abstraction has 11576 states and 42727 transitions. [2021-05-21 20:37:05,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 11576 states and 42727 transitions. [2021-05-21 20:37:05,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:05,918 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:05,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:06,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:06,119 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:06,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:06,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1736892992, now seen corresponding path program 65 times [2021-05-21 20:37:06,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:06,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359759045] [2021-05-21 20:37:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:06,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:06,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359759045] [2021-05-21 20:37:06,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359759045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:06,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678455657] [2021-05-21 20:37:06,183 INFO L93 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 [2021-05-21 20:37:06,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:37:06,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:06,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:06,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678455657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:06,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:06,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:06,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688497620] [2021-05-21 20:37:06,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:06,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:06,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:06,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:06,324 INFO L87 Difference]: Start difference. First operand 11576 states and 42727 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:06,568 INFO L93 Difference]: Finished difference Result 11997 states and 43864 transitions. [2021-05-21 20:37:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:06,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:06,588 INFO L225 Difference]: With dead ends: 11997 [2021-05-21 20:37:06,588 INFO L226 Difference]: Without dead ends: 11917 [2021-05-21 20:37:06,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:37:06,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11917 states. [2021-05-21 20:37:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11917 to 11602. [2021-05-21 20:37:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11602 states, 11601 states have (on average 3.6938194983191104) internal successors, (42852), 11601 states have internal predecessors, (42852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11602 states to 11602 states and 42852 transitions. [2021-05-21 20:37:06,756 INFO L78 Accepts]: Start accepts. Automaton has 11602 states and 42852 transitions. Word has length 27 [2021-05-21 20:37:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:06,756 INFO L482 AbstractCegarLoop]: Abstraction has 11602 states and 42852 transitions. [2021-05-21 20:37:06,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:06,756 INFO L276 IsEmpty]: Start isEmpty. Operand 11602 states and 42852 transitions. [2021-05-21 20:37:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:06,772 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:06,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:06,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:06,972 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:06,973 INFO L82 PathProgramCache]: Analyzing trace with hash -73533572, now seen corresponding path program 66 times [2021-05-21 20:37:06,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:06,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321504972] [2021-05-21 20:37:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:07,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:07,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321504972] [2021-05-21 20:37:07,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321504972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:07,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671317675] [2021-05-21 20:37:07,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:37:07,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:37:07,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:07,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:07,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:07,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671317675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:07,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:07,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:07,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821707905] [2021-05-21 20:37:07,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:07,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:07,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:07,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:07,186 INFO L87 Difference]: Start difference. First operand 11602 states and 42852 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:07,409 INFO L93 Difference]: Finished difference Result 11771 states and 43353 transitions. [2021-05-21 20:37:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:37:07,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:07,430 INFO L225 Difference]: With dead ends: 11771 [2021-05-21 20:37:07,430 INFO L226 Difference]: Without dead ends: 11756 [2021-05-21 20:37:07,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:37:07,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11756 states. [2021-05-21 20:37:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11756 to 11607. [2021-05-21 20:37:07,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11607 states, 11606 states have (on average 3.694468378424953) internal successors, (42878), 11606 states have internal predecessors, (42878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:07,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11607 states to 11607 states and 42878 transitions. [2021-05-21 20:37:07,632 INFO L78 Accepts]: Start accepts. Automaton has 11607 states and 42878 transitions. Word has length 27 [2021-05-21 20:37:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:07,632 INFO L482 AbstractCegarLoop]: Abstraction has 11607 states and 42878 transitions. [2021-05-21 20:37:07,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:07,632 INFO L276 IsEmpty]: Start isEmpty. Operand 11607 states and 42878 transitions. [2021-05-21 20:37:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:07,647 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:07,647 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:07,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-21 20:37:07,848 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:07,848 INFO L82 PathProgramCache]: Analyzing trace with hash -819151172, now seen corresponding path program 67 times [2021-05-21 20:37:07,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:07,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226187653] [2021-05-21 20:37:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:07,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:07,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226187653] [2021-05-21 20:37:07,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226187653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:07,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031289394] [2021-05-21 20:37:07,915 INFO 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 [2021-05-21 20:37:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:07,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:07,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:08,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031289394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:08,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:08,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:08,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147940098] [2021-05-21 20:37:08,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:08,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:08,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:08,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:08,099 INFO L87 Difference]: Start difference. First operand 11607 states and 42878 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:08,345 INFO L93 Difference]: Finished difference Result 13036 states and 47204 transitions. [2021-05-21 20:37:08,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:37:08,345 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:08,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:08,368 INFO L225 Difference]: With dead ends: 13036 [2021-05-21 20:37:08,368 INFO L226 Difference]: Without dead ends: 12976 [2021-05-21 20:37:08,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:37:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12976 states. [2021-05-21 20:37:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12976 to 11956. [2021-05-21 20:37:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11956 states, 11955 states have (on average 3.700710999581765) internal successors, (44242), 11955 states have internal predecessors, (44242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11956 states to 11956 states and 44242 transitions. [2021-05-21 20:37:08,548 INFO L78 Accepts]: Start accepts. Automaton has 11956 states and 44242 transitions. Word has length 27 [2021-05-21 20:37:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:08,548 INFO L482 AbstractCegarLoop]: Abstraction has 11956 states and 44242 transitions. [2021-05-21 20:37:08,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 11956 states and 44242 transitions. [2021-05-21 20:37:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:08,564 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:08,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:08,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:08,765 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:08,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1181413760, now seen corresponding path program 68 times [2021-05-21 20:37:08,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:08,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111269835] [2021-05-21 20:37:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:08,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:08,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111269835] [2021-05-21 20:37:08,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111269835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:08,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421872988] [2021-05-21 20:37:08,814 INFO L93 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 [2021-05-21 20:37:08,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:08,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:08,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:08,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:08,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421872988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:08,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:08,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:37:08,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26320752] [2021-05-21 20:37:08,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:37:08,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:08,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:37:08,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:37:08,952 INFO L87 Difference]: Start difference. First operand 11956 states and 44242 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:09,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:09,107 INFO L93 Difference]: Finished difference Result 12395 states and 45519 transitions. [2021-05-21 20:37:09,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:37:09,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:37:09,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:09,129 INFO L225 Difference]: With dead ends: 12395 [2021-05-21 20:37:09,129 INFO L226 Difference]: Without dead ends: 12365 [2021-05-21 20:37:09,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12365 states. [2021-05-21 20:37:09,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12365 to 11952. [2021-05-21 20:37:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11952 states, 11951 states have (on average 3.7014475776085685) internal successors, (44236), 11951 states have internal predecessors, (44236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11952 states to 11952 states and 44236 transitions. [2021-05-21 20:37:09,293 INFO L78 Accepts]: Start accepts. Automaton has 11952 states and 44236 transitions. Word has length 27 [2021-05-21 20:37:09,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:09,293 INFO L482 AbstractCegarLoop]: Abstraction has 11952 states and 44236 transitions. [2021-05-21 20:37:09,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 11952 states and 44236 transitions. [2021-05-21 20:37:09,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:09,308 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:09,309 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:09,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-21 20:37:09,513 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:09,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:09,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1510401284, now seen corresponding path program 69 times [2021-05-21 20:37:09,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:09,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773712259] [2021-05-21 20:37:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:09,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:09,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773712259] [2021-05-21 20:37:09,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773712259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:09,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455924250] [2021-05-21 20:37:09,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:37:09,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:37:09,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:09,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:09,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:09,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455924250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:09,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:09,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:37:09,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280442301] [2021-05-21 20:37:09,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:37:09,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:09,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:37:09,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:37:09,722 INFO L87 Difference]: Start difference. First operand 11952 states and 44236 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:09,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:09,878 INFO L93 Difference]: Finished difference Result 12368 states and 45416 transitions. [2021-05-21 20:37:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:09,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:37:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:09,900 INFO L225 Difference]: With dead ends: 12368 [2021-05-21 20:37:09,900 INFO L226 Difference]: Without dead ends: 12338 [2021-05-21 20:37:09,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:09,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12338 states. [2021-05-21 20:37:10,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12338 to 11996. [2021-05-21 20:37:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11995 states have (on average 3.7018757815756564) internal successors, (44404), 11995 states have internal predecessors, (44404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:10,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 44404 transitions. [2021-05-21 20:37:10,067 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 44404 transitions. Word has length 27 [2021-05-21 20:37:10,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:10,067 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 44404 transitions. [2021-05-21 20:37:10,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:10,067 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 44404 transitions. [2021-05-21 20:37:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:10,083 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:10,083 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:10,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-21 20:37:10,284 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:10,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:10,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1977800140, now seen corresponding path program 70 times [2021-05-21 20:37:10,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:10,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461161648] [2021-05-21 20:37:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:10,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:10,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461161648] [2021-05-21 20:37:10,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461161648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:10,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471931401] [2021-05-21 20:37:10,340 INFO L93 rtionOrderModulation]: Changing 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 [2021-05-21 20:37:10,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:37:10,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:10,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:10,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:10,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471931401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:10,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:10,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:37:10,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111797794] [2021-05-21 20:37:10,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:37:10,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:10,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:37:10,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:37:10,481 INFO L87 Difference]: Start difference. First operand 11996 states and 44404 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:10,706 INFO L93 Difference]: Finished difference Result 12466 states and 45766 transitions. [2021-05-21 20:37:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:10,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:37:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:10,727 INFO L225 Difference]: With dead ends: 12466 [2021-05-21 20:37:10,727 INFO L226 Difference]: Without dead ends: 12395 [2021-05-21 20:37:10,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:10,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12395 states. [2021-05-21 20:37:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12395 to 12062. [2021-05-21 20:37:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12062 states, 12061 states have (on average 3.7025951413647293) internal successors, (44657), 12061 states have internal predecessors, (44657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12062 states to 12062 states and 44657 transitions. [2021-05-21 20:37:10,892 INFO L78 Accepts]: Start accepts. Automaton has 12062 states and 44657 transitions. Word has length 27 [2021-05-21 20:37:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:10,892 INFO L482 AbstractCegarLoop]: Abstraction has 12062 states and 44657 transitions. [2021-05-21 20:37:10,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:10,892 INFO L276 IsEmpty]: Start isEmpty. Operand 12062 states and 44657 transitions. [2021-05-21 20:37:10,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:10,908 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:10,908 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:11,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-21 20:37:11,109 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:11,109 INFO L82 PathProgramCache]: Analyzing trace with hash -387127492, now seen corresponding path program 71 times [2021-05-21 20:37:11,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:11,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041324806] [2021-05-21 20:37:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:11,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:11,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041324806] [2021-05-21 20:37:11,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041324806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:11,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241316114] [2021-05-21 20:37:11,164 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 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 [2021-05-21 20:37:11,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:37:11,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:11,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:11,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:11,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241316114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:11,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:11,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:37:11,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818732911] [2021-05-21 20:37:11,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:37:11,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:11,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:37:11,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:37:11,317 INFO L87 Difference]: Start difference. First operand 12062 states and 44657 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:11,510 INFO L93 Difference]: Finished difference Result 12451 states and 45748 transitions. [2021-05-21 20:37:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:37:11,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:37:11,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:11,532 INFO L225 Difference]: With dead ends: 12451 [2021-05-21 20:37:11,532 INFO L226 Difference]: Without dead ends: 12413 [2021-05-21 20:37:11,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:11,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12413 states. [2021-05-21 20:37:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12413 to 12104. [2021-05-21 20:37:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 3.702883582582831) internal successors, (44816), 12103 states have internal predecessors, (44816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 44816 transitions. [2021-05-21 20:37:11,698 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 44816 transitions. Word has length 27 [2021-05-21 20:37:11,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:11,698 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 44816 transitions. [2021-05-21 20:37:11,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:11,698 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 44816 transitions. [2021-05-21 20:37:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:11,714 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:11,714 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:11,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:11,914 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:11,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:11,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1978137212, now seen corresponding path program 72 times [2021-05-21 20:37:11,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:11,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467372370] [2021-05-21 20:37:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:11,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:11,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467372370] [2021-05-21 20:37:11,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467372370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:11,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455811901] [2021-05-21 20:37:11,970 INFO L93 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 [2021-05-21 20:37:12,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:37:12,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:12,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:12,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455811901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:12,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:12,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:37:12,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405899366] [2021-05-21 20:37:12,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:37:12,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:12,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:37:12,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:37:12,143 INFO L87 Difference]: Start difference. First operand 12104 states and 44816 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:12,388 INFO L93 Difference]: Finished difference Result 12499 states and 45950 transitions. [2021-05-21 20:37:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:12,388 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:37:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:12,410 INFO L225 Difference]: With dead ends: 12499 [2021-05-21 20:37:12,410 INFO L226 Difference]: Without dead ends: 12469 [2021-05-21 20:37:12,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:37:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12469 states. [2021-05-21 20:37:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12469 to 12148. [2021-05-21 20:37:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12148 states, 12147 states have (on average 3.7034658763480697) internal successors, (44986), 12147 states have internal predecessors, (44986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12148 states to 12148 states and 44986 transitions. [2021-05-21 20:37:12,576 INFO L78 Accepts]: Start accepts. Automaton has 12148 states and 44986 transitions. Word has length 27 [2021-05-21 20:37:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:12,577 INFO L482 AbstractCegarLoop]: Abstraction has 12148 states and 44986 transitions. [2021-05-21 20:37:12,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 12148 states and 44986 transitions. [2021-05-21 20:37:12,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:12,593 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:12,593 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:12,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:12,794 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:12,794 INFO L82 PathProgramCache]: Analyzing trace with hash -4216000, now seen corresponding path program 73 times [2021-05-21 20:37:12,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:12,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106802852] [2021-05-21 20:37:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:12,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:12,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106802852] [2021-05-21 20:37:12,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106802852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:12,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825154812] [2021-05-21 20:37:12,846 INFO 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 [2021-05-21 20:37:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:12,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:12,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:12,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825154812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:12,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:12,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:37:12,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246147756] [2021-05-21 20:37:12,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:37:12,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:12,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:37:12,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:37:12,986 INFO L87 Difference]: Start difference. First operand 12148 states and 44986 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:13,186 INFO L93 Difference]: Finished difference Result 12648 states and 46358 transitions. [2021-05-21 20:37:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:13,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:37:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:13,208 INFO L225 Difference]: With dead ends: 12648 [2021-05-21 20:37:13,209 INFO L226 Difference]: Without dead ends: 12604 [2021-05-21 20:37:13,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:37:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12604 states. [2021-05-21 20:37:13,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12604 to 12166. [2021-05-21 20:37:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12166 states, 12165 states have (on average 3.705219893136046) internal successors, (45074), 12165 states have internal predecessors, (45074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12166 states to 12166 states and 45074 transitions. [2021-05-21 20:37:13,383 INFO L78 Accepts]: Start accepts. Automaton has 12166 states and 45074 transitions. Word has length 27 [2021-05-21 20:37:13,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:13,383 INFO L482 AbstractCegarLoop]: Abstraction has 12166 states and 45074 transitions. [2021-05-21 20:37:13,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand 12166 states and 45074 transitions. [2021-05-21 20:37:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:13,399 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:13,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:13,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:13,602 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:13,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:13,602 INFO L82 PathProgramCache]: Analyzing trace with hash 903412800, now seen corresponding path program 74 times [2021-05-21 20:37:13,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:13,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673054597] [2021-05-21 20:37:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:13,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:13,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673054597] [2021-05-21 20:37:13,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673054597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:13,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436961438] [2021-05-21 20:37:13,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:37:13,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:13,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:13,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:13,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:13,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436961438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:13,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:13,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:37:13,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363327915] [2021-05-21 20:37:13,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:37:13,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:13,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:37:13,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:37:13,837 INFO L87 Difference]: Start difference. First operand 12166 states and 45074 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:14,047 INFO L93 Difference]: Finished difference Result 12571 states and 46145 transitions. [2021-05-21 20:37:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:14,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-05-21 20:37:14,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:14,069 INFO L225 Difference]: With dead ends: 12571 [2021-05-21 20:37:14,069 INFO L226 Difference]: Without dead ends: 12515 [2021-05-21 20:37:14,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:37:14,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12515 states. [2021-05-21 20:37:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12515 to 12209. [2021-05-21 20:37:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12209 states, 12208 states have (on average 3.705848623853211) internal successors, (45241), 12208 states have internal predecessors, (45241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12209 states to 12209 states and 45241 transitions. [2021-05-21 20:37:14,239 INFO L78 Accepts]: Start accepts. Automaton has 12209 states and 45241 transitions. Word has length 27 [2021-05-21 20:37:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:14,239 INFO L482 AbstractCegarLoop]: Abstraction has 12209 states and 45241 transitions. [2021-05-21 20:37:14,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-05-21 20:37:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 12209 states and 45241 transitions. [2021-05-21 20:37:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:14,256 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:14,257 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:14,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:14,457 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:14,457 INFO L82 PathProgramCache]: Analyzing trace with hash -995116224, now seen corresponding path program 75 times [2021-05-21 20:37:14,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:14,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680941904] [2021-05-21 20:37:14,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:14,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:14,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680941904] [2021-05-21 20:37:14,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680941904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:14,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560178169] [2021-05-21 20:37:14,536 INFO L93 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 [2021-05-21 20:37:14,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:37:14,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:14,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:14,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560178169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:14,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:14,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:14,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620430119] [2021-05-21 20:37:14,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:14,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:14,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:14,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:14,692 INFO L87 Difference]: Start difference. First operand 12209 states and 45241 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:14,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:14,950 INFO L93 Difference]: Finished difference Result 12816 states and 46949 transitions. [2021-05-21 20:37:14,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:14,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:14,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:14,973 INFO L225 Difference]: With dead ends: 12816 [2021-05-21 20:37:14,973 INFO L226 Difference]: Without dead ends: 12786 [2021-05-21 20:37:14,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:37:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12786 states. [2021-05-21 20:37:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12786 to 12267. [2021-05-21 20:37:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12267 states, 12266 states have (on average 3.7053644219794553) internal successors, (45450), 12266 states have internal predecessors, (45450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12267 states to 12267 states and 45450 transitions. [2021-05-21 20:37:15,227 INFO L78 Accepts]: Start accepts. Automaton has 12267 states and 45450 transitions. Word has length 27 [2021-05-21 20:37:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:15,227 INFO L482 AbstractCegarLoop]: Abstraction has 12267 states and 45450 transitions. [2021-05-21 20:37:15,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 12267 states and 45450 transitions. [2021-05-21 20:37:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:15,243 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:15,243 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:15,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-05-21 20:37:15,443 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:15,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:15,444 INFO L82 PathProgramCache]: Analyzing trace with hash -527717368, now seen corresponding path program 76 times [2021-05-21 20:37:15,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:15,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085502487] [2021-05-21 20:37:15,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:15,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:15,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085502487] [2021-05-21 20:37:15,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085502487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:15,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646693256] [2021-05-21 20:37:15,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:15,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:37:15,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:15,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:15,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:15,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646693256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:15,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:15,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:15,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146506740] [2021-05-21 20:37:15,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:15,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:15,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:15,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:15,664 INFO L87 Difference]: Start difference. First operand 12267 states and 45450 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:15,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:15,914 INFO L93 Difference]: Finished difference Result 12669 states and 46586 transitions. [2021-05-21 20:37:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:15,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:15,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:15,937 INFO L225 Difference]: With dead ends: 12669 [2021-05-21 20:37:15,937 INFO L226 Difference]: Without dead ends: 12631 [2021-05-21 20:37:15,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:37:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-05-21 20:37:16,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 12291. [2021-05-21 20:37:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12291 states, 12290 states have (on average 3.7069975589910498) internal successors, (45559), 12290 states have internal predecessors, (45559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:16,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12291 states to 12291 states and 45559 transitions. [2021-05-21 20:37:16,113 INFO L78 Accepts]: Start accepts. Automaton has 12291 states and 45559 transitions. Word has length 27 [2021-05-21 20:37:16,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:16,114 INFO L482 AbstractCegarLoop]: Abstraction has 12291 states and 45559 transitions. [2021-05-21 20:37:16,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:16,114 INFO L276 IsEmpty]: Start isEmpty. Operand 12291 states and 45559 transitions. [2021-05-21 20:37:16,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:16,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:16,131 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:16,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:16,331 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:16,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:16,331 INFO L82 PathProgramCache]: Analyzing trace with hash -20110840, now seen corresponding path program 77 times [2021-05-21 20:37:16,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:16,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912383883] [2021-05-21 20:37:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:16,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:16,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912383883] [2021-05-21 20:37:16,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912383883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:16,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904166834] [2021-05-21 20:37:16,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:16,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:37:16,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:16,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:16,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:16,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904166834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:16,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:16,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:16,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226118867] [2021-05-21 20:37:16,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:16,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:16,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:16,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:16,540 INFO L87 Difference]: Start difference. First operand 12291 states and 45559 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:16,818 INFO L93 Difference]: Finished difference Result 12456 states and 46048 transitions. [2021-05-21 20:37:16,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:37:16,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:16,838 INFO L225 Difference]: With dead ends: 12456 [2021-05-21 20:37:16,839 INFO L226 Difference]: Without dead ends: 12441 [2021-05-21 20:37:16,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:37:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12441 states. [2021-05-21 20:37:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12441 to 12288. [2021-05-21 20:37:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12288 states, 12287 states have (on average 3.7083909823390577) internal successors, (45565), 12287 states have internal predecessors, (45565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12288 states to 12288 states and 45565 transitions. [2021-05-21 20:37:17,003 INFO L78 Accepts]: Start accepts. Automaton has 12288 states and 45565 transitions. Word has length 27 [2021-05-21 20:37:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:17,003 INFO L482 AbstractCegarLoop]: Abstraction has 12288 states and 45565 transitions. [2021-05-21 20:37:17,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:17,003 INFO L276 IsEmpty]: Start isEmpty. Operand 12288 states and 45565 transitions. [2021-05-21 20:37:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:17,020 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:17,020 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:17,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:17,221 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1507837696, now seen corresponding path program 78 times [2021-05-21 20:37:17,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:17,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697713415] [2021-05-21 20:37:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:17,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:17,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697713415] [2021-05-21 20:37:17,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697713415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:17,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229219504] [2021-05-21 20:37:17,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:37:17,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:37:17,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:17,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:17,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:17,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229219504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:17,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:17,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:17,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679844718] [2021-05-21 20:37:17,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:17,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:17,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:17,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:17,477 INFO L87 Difference]: Start difference. First operand 12288 states and 45565 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:17,692 INFO L93 Difference]: Finished difference Result 12934 states and 47416 transitions. [2021-05-21 20:37:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:17,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:17,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:17,715 INFO L225 Difference]: With dead ends: 12934 [2021-05-21 20:37:17,715 INFO L226 Difference]: Without dead ends: 12890 [2021-05-21 20:37:17,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:37:17,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2021-05-21 20:37:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 12354. [2021-05-21 20:37:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12354 states, 12353 states have (on average 3.7074394883833888) internal successors, (45798), 12353 states have internal predecessors, (45798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12354 states to 12354 states and 45798 transitions. [2021-05-21 20:37:17,899 INFO L78 Accepts]: Start accepts. Automaton has 12354 states and 45798 transitions. Word has length 27 [2021-05-21 20:37:17,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:17,900 INFO L482 AbstractCegarLoop]: Abstraction has 12354 states and 45798 transitions. [2021-05-21 20:37:17,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 12354 states and 45798 transitions. [2021-05-21 20:37:17,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:17,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:17,916 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:18,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:18,121 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1631076228, now seen corresponding path program 79 times [2021-05-21 20:37:18,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:18,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468511527] [2021-05-21 20:37:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:18,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:18,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468511527] [2021-05-21 20:37:18,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468511527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:18,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412884611] [2021-05-21 20:37:18,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:18,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:18,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:18,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412884611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:18,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:18,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:18,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412233051] [2021-05-21 20:37:18,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:18,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:18,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:18,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:18,331 INFO L87 Difference]: Start difference. First operand 12354 states and 45798 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:18,514 INFO L93 Difference]: Finished difference Result 12785 states and 46949 transitions. [2021-05-21 20:37:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:18,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:18,537 INFO L225 Difference]: With dead ends: 12785 [2021-05-21 20:37:18,537 INFO L226 Difference]: Without dead ends: 12687 [2021-05-21 20:37:18,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:37:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12687 states. [2021-05-21 20:37:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12687 to 12380. [2021-05-21 20:37:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12380 states, 12379 states have (on average 3.7087002181113173) internal successors, (45910), 12379 states have internal predecessors, (45910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12380 states to 12380 states and 45910 transitions. [2021-05-21 20:37:18,723 INFO L78 Accepts]: Start accepts. Automaton has 12380 states and 45910 transitions. Word has length 27 [2021-05-21 20:37:18,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:18,723 INFO L482 AbstractCegarLoop]: Abstraction has 12380 states and 45910 transitions. [2021-05-21 20:37:18,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:18,723 INFO L276 IsEmpty]: Start isEmpty. Operand 12380 states and 45910 transitions. [2021-05-21 20:37:18,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:18,740 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:18,740 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:18,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:18,945 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash -179350336, now seen corresponding path program 80 times [2021-05-21 20:37:18,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:18,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130874417] [2021-05-21 20:37:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:19,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:19,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130874417] [2021-05-21 20:37:19,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130874417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:19,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241004160] [2021-05-21 20:37:19,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:19,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:19,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:19,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:19,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:19,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241004160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:19,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:19,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:19,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433679187] [2021-05-21 20:37:19,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:19,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:19,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:19,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:19,157 INFO L87 Difference]: Start difference. First operand 12380 states and 45910 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:19,425 INFO L93 Difference]: Finished difference Result 12574 states and 46469 transitions. [2021-05-21 20:37:19,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:37:19,426 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:19,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:19,446 INFO L225 Difference]: With dead ends: 12574 [2021-05-21 20:37:19,446 INFO L226 Difference]: Without dead ends: 12552 [2021-05-21 20:37:19,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:37:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12552 states. [2021-05-21 20:37:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12552 to 12373. [2021-05-21 20:37:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12373 states, 12372 states have (on average 3.7103136113805366) internal successors, (45904), 12372 states have internal predecessors, (45904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12373 states to 12373 states and 45904 transitions. [2021-05-21 20:37:19,616 INFO L78 Accepts]: Start accepts. Automaton has 12373 states and 45904 transitions. Word has length 27 [2021-05-21 20:37:19,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:19,616 INFO L482 AbstractCegarLoop]: Abstraction has 12373 states and 45904 transitions. [2021-05-21 20:37:19,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 12373 states and 45904 transitions. [2021-05-21 20:37:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:19,633 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:19,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:19,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-21 20:37:19,834 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:19,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:19,834 INFO L82 PathProgramCache]: Analyzing trace with hash 887736380, now seen corresponding path program 81 times [2021-05-21 20:37:19,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:19,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937098040] [2021-05-21 20:37:19,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:19,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:19,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937098040] [2021-05-21 20:37:19,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937098040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:19,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833717371] [2021-05-21 20:37:19,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:37:19,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:37:19,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:19,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:19,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:20,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833717371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:20,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:20,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:20,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999456470] [2021-05-21 20:37:20,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:20,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:20,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:20,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:20,044 INFO L87 Difference]: Start difference. First operand 12373 states and 45904 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:20,351 INFO L93 Difference]: Finished difference Result 13084 states and 47922 transitions. [2021-05-21 20:37:20,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:37:20,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:20,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:20,373 INFO L225 Difference]: With dead ends: 13084 [2021-05-21 20:37:20,373 INFO L226 Difference]: Without dead ends: 13054 [2021-05-21 20:37:20,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:37:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13054 states. [2021-05-21 20:37:20,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13054 to 12469. [2021-05-21 20:37:20,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12469 states, 12468 states have (on average 3.7080526146936155) internal successors, (46232), 12468 states have internal predecessors, (46232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12469 states to 12469 states and 46232 transitions. [2021-05-21 20:37:20,565 INFO L78 Accepts]: Start accepts. Automaton has 12469 states and 46232 transitions. Word has length 27 [2021-05-21 20:37:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:20,565 INFO L482 AbstractCegarLoop]: Abstraction has 12469 states and 46232 transitions. [2021-05-21 20:37:20,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 12469 states and 46232 transitions. [2021-05-21 20:37:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:20,584 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:20,584 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:20,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-21 20:37:20,785 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:20,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:20,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1977991744, now seen corresponding path program 82 times [2021-05-21 20:37:20,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:20,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755730638] [2021-05-21 20:37:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:20,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:20,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755730638] [2021-05-21 20:37:20,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755730638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:20,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111548381] [2021-05-21 20:37:20,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:37:20,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:37:20,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:20,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:20,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:21,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111548381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:21,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:21,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:21,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465140696] [2021-05-21 20:37:21,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:21,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:21,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:21,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:21,031 INFO L87 Difference]: Start difference. First operand 12469 states and 46232 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:21,264 INFO L93 Difference]: Finished difference Result 12896 states and 47434 transitions. [2021-05-21 20:37:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:37:21,264 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:21,298 INFO L225 Difference]: With dead ends: 12896 [2021-05-21 20:37:21,298 INFO L226 Difference]: Without dead ends: 12812 [2021-05-21 20:37:21,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:37:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12812 states. [2021-05-21 20:37:21,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12812 to 12548. [2021-05-21 20:37:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12548 states, 12547 states have (on average 3.7084562046704392) internal successors, (46530), 12547 states have internal predecessors, (46530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:21,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12548 states to 12548 states and 46530 transitions. [2021-05-21 20:37:21,536 INFO L78 Accepts]: Start accepts. Automaton has 12548 states and 46530 transitions. Word has length 27 [2021-05-21 20:37:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:21,536 INFO L482 AbstractCegarLoop]: Abstraction has 12548 states and 46530 transitions. [2021-05-21 20:37:21,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 12548 states and 46530 transitions. [2021-05-21 20:37:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:21,561 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:21,561 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:21,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:21,777 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:21,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1395187844, now seen corresponding path program 83 times [2021-05-21 20:37:21,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:21,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511892207] [2021-05-21 20:37:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:21,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:21,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511892207] [2021-05-21 20:37:21,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511892207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:21,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092019836] [2021-05-21 20:37:21,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:21,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:37:21,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:21,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:21,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:21,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092019836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:21,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:21,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:21,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324008961] [2021-05-21 20:37:21,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:21,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:21,992 INFO L87 Difference]: Start difference. First operand 12548 states and 46530 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:22,195 INFO L93 Difference]: Finished difference Result 12969 states and 47738 transitions. [2021-05-21 20:37:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:22,195 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:22,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:22,217 INFO L225 Difference]: With dead ends: 12969 [2021-05-21 20:37:22,217 INFO L226 Difference]: Without dead ends: 12939 [2021-05-21 20:37:22,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:37:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12939 states. [2021-05-21 20:37:22,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12939 to 12565. [2021-05-21 20:37:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 3.7117160140082777) internal successors, (46634), 12564 states have internal predecessors, (46634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:22,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 46634 transitions. [2021-05-21 20:37:22,407 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 46634 transitions. Word has length 27 [2021-05-21 20:37:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:22,407 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 46634 transitions. [2021-05-21 20:37:22,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 46634 transitions. [2021-05-21 20:37:22,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:22,424 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:22,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:22,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:22,625 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:22,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1958802428, now seen corresponding path program 84 times [2021-05-21 20:37:22,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:22,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481372460] [2021-05-21 20:37:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:22,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:22,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481372460] [2021-05-21 20:37:22,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481372460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:22,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600772695] [2021-05-21 20:37:22,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:22,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:37:22,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:22,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:22,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:22,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600772695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:22,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:22,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:22,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251711534] [2021-05-21 20:37:22,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:22,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:22,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:22,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:22,836 INFO L87 Difference]: Start difference. First operand 12565 states and 46634 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:23,073 INFO L93 Difference]: Finished difference Result 13017 states and 47934 transitions. [2021-05-21 20:37:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:23,073 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:23,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:23,096 INFO L225 Difference]: With dead ends: 13017 [2021-05-21 20:37:23,096 INFO L226 Difference]: Without dead ends: 12987 [2021-05-21 20:37:23,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:37:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12987 states. [2021-05-21 20:37:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12987 to 12637. [2021-05-21 20:37:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12637 states, 12636 states have (on average 3.7109844887622665) internal successors, (46892), 12636 states have internal predecessors, (46892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12637 states to 12637 states and 46892 transitions. [2021-05-21 20:37:23,331 INFO L78 Accepts]: Start accepts. Automaton has 12637 states and 46892 transitions. Word has length 27 [2021-05-21 20:37:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:23,331 INFO L482 AbstractCegarLoop]: Abstraction has 12637 states and 46892 transitions. [2021-05-21 20:37:23,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 12637 states and 46892 transitions. [2021-05-21 20:37:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:23,349 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:23,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:23,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:23,550 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:23,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1037014720, now seen corresponding path program 85 times [2021-05-21 20:37:23,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:23,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353641868] [2021-05-21 20:37:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:23,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:23,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353641868] [2021-05-21 20:37:23,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353641868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:23,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461903302] [2021-05-21 20:37:23,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:23,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:23,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:23,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461903302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:23,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:23,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:23,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155207702] [2021-05-21 20:37:23,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:23,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:23,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:23,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:23,773 INFO L87 Difference]: Start difference. First operand 12637 states and 46892 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:24,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:24,038 INFO L93 Difference]: Finished difference Result 13031 states and 47962 transitions. [2021-05-21 20:37:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:37:24,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:24,061 INFO L225 Difference]: With dead ends: 13031 [2021-05-21 20:37:24,061 INFO L226 Difference]: Without dead ends: 12951 [2021-05-21 20:37:24,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:37:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12951 states. [2021-05-21 20:37:24,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12951 to 12663. [2021-05-21 20:37:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12663 states, 12662 states have (on average 3.7132364555362503) internal successors, (47017), 12662 states have internal predecessors, (47017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12663 states to 12663 states and 47017 transitions. [2021-05-21 20:37:24,244 INFO L78 Accepts]: Start accepts. Automaton has 12663 states and 47017 transitions. Word has length 27 [2021-05-21 20:37:24,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:24,244 INFO L482 AbstractCegarLoop]: Abstraction has 12663 states and 47017 transitions. [2021-05-21 20:37:24,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 12663 states and 47017 transitions. [2021-05-21 20:37:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 20:37:24,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:24,262 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:24,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:24,463 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:24,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1052109376, now seen corresponding path program 86 times [2021-05-21 20:37:24,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:24,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178673826] [2021-05-21 20:37:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:24,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:24,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178673826] [2021-05-21 20:37:24,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178673826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:24,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943560414] [2021-05-21 20:37:24,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:24,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:24,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:24,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 20:37:24,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:24,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943560414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:24,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:24,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:24,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468051615] [2021-05-21 20:37:24,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:24,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:24,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:24,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:24,697 INFO L87 Difference]: Start difference. First operand 12663 states and 47017 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:25,005 INFO L93 Difference]: Finished difference Result 12828 states and 47506 transitions. [2021-05-21 20:37:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:37:25,005 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 27 [2021-05-21 20:37:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:25,028 INFO L225 Difference]: With dead ends: 12828 [2021-05-21 20:37:25,028 INFO L226 Difference]: Without dead ends: 12813 [2021-05-21 20:37:25,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:37:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12813 states. [2021-05-21 20:37:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12813 to 12651. [2021-05-21 20:37:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 3.714229249011858) internal successors, (46985), 12650 states have internal predecessors, (46985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:25,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 46985 transitions. [2021-05-21 20:37:25,204 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 46985 transitions. Word has length 27 [2021-05-21 20:37:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:25,204 INFO L482 AbstractCegarLoop]: Abstraction has 12651 states and 46985 transitions. [2021-05-21 20:37:25,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-05-21 20:37:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 46985 transitions. [2021-05-21 20:37:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:25,222 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:25,222 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:25,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:25,423 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:25,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:25,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1489264556, now seen corresponding path program 87 times [2021-05-21 20:37:25,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:25,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125543724] [2021-05-21 20:37:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:25,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:25,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125543724] [2021-05-21 20:37:25,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125543724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:25,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104578375] [2021-05-21 20:37:25,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:25,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:37:25,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:25,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:25,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:37:25,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104578375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:25,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:25,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711284158] [2021-05-21 20:37:25,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:25,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:25,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:25,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:25,542 INFO L87 Difference]: Start difference. First operand 12651 states and 46985 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2021-05-21 20:37:26,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:26,016 INFO L93 Difference]: Finished difference Result 22245 states and 78518 transitions. [2021-05-21 20:37:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:37:26,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 29 [2021-05-21 20:37:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:26,054 INFO L225 Difference]: With dead ends: 22245 [2021-05-21 20:37:26,055 INFO L226 Difference]: Without dead ends: 22157 [2021-05-21 20:37:26,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:37:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22157 states. [2021-05-21 20:37:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22157 to 13996. [2021-05-21 20:37:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13996 states, 13995 states have (on average 3.697463379778492) internal successors, (51746), 13995 states have internal predecessors, (51746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:26,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13996 states to 13996 states and 51746 transitions. [2021-05-21 20:37:26,314 INFO L78 Accepts]: Start accepts. Automaton has 13996 states and 51746 transitions. Word has length 29 [2021-05-21 20:37:26,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:26,315 INFO L482 AbstractCegarLoop]: Abstraction has 13996 states and 51746 transitions. [2021-05-21 20:37:26,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2021-05-21 20:37:26,315 INFO L276 IsEmpty]: Start isEmpty. Operand 13996 states and 51746 transitions. [2021-05-21 20:37:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:26,335 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:26,335 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:26,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:26,536 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:26,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:26,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1582018668, now seen corresponding path program 88 times [2021-05-21 20:37:26,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:26,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631187093] [2021-05-21 20:37:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:26,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:26,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631187093] [2021-05-21 20:37:26,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631187093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:26,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175673283] [2021-05-21 20:37:26,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:37:26,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:37:26,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:26,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:26,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:26,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175673283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:26,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:26,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:37:26,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724204436] [2021-05-21 20:37:26,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:37:26,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:26,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:37:26,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:37:26,652 INFO L87 Difference]: Start difference. First operand 13996 states and 51746 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) [2021-05-21 20:37:26,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:26,876 INFO L93 Difference]: Finished difference Result 20503 states and 74398 transitions. [2021-05-21 20:37:26,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:37:26,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 29 [2021-05-21 20:37:26,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:26,913 INFO L225 Difference]: With dead ends: 20503 [2021-05-21 20:37:26,913 INFO L226 Difference]: Without dead ends: 20406 [2021-05-21 20:37:26,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:37:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20406 states. [2021-05-21 20:37:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20406 to 17863. [2021-05-21 20:37:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.743141865412608) internal successors, (66860), 17862 states have internal predecessors, (66860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 66860 transitions. [2021-05-21 20:37:27,292 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 66860 transitions. Word has length 29 [2021-05-21 20:37:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:27,292 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 66860 transitions. [2021-05-21 20:37:27,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) [2021-05-21 20:37:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 66860 transitions. [2021-05-21 20:37:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:27,318 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:27,318 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:27,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:27,518 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:27,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1828893528, now seen corresponding path program 89 times [2021-05-21 20:37:27,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:27,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070866070] [2021-05-21 20:37:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:37:27,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:27,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070866070] [2021-05-21 20:37:27,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070866070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:27,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016848915] [2021-05-21 20:37:27,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:37:27,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:37:27,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:27,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:27,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:37:27,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016848915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:27,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:27,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:37:27,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019985960] [2021-05-21 20:37:27,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:37:27,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:27,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:37:27,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:37:27,618 INFO L87 Difference]: Start difference. First operand 17863 states and 66860 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-05-21 20:37:28,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:28,213 INFO L93 Difference]: Finished difference Result 41463 states and 150404 transitions. [2021-05-21 20:37:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 20:37:28,213 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 29 [2021-05-21 20:37:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:28,298 INFO L225 Difference]: With dead ends: 41463 [2021-05-21 20:37:28,298 INFO L226 Difference]: Without dead ends: 40731 [2021-05-21 20:37:28,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=456, Invalid=1436, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 20:37:28,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40731 states. [2021-05-21 20:37:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40731 to 28028. [2021-05-21 20:37:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28028 states, 28027 states have (on average 3.774895636350662) internal successors, (105799), 28027 states have internal predecessors, (105799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28028 states to 28028 states and 105799 transitions. [2021-05-21 20:37:28,934 INFO L78 Accepts]: Start accepts. Automaton has 28028 states and 105799 transitions. Word has length 29 [2021-05-21 20:37:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:28,934 INFO L482 AbstractCegarLoop]: Abstraction has 28028 states and 105799 transitions. [2021-05-21 20:37:28,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-05-21 20:37:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 28028 states and 105799 transitions. [2021-05-21 20:37:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:28,978 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:28,979 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:29,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-21 20:37:29,181 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:29,181 INFO L82 PathProgramCache]: Analyzing trace with hash 904383528, now seen corresponding path program 90 times [2021-05-21 20:37:29,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:29,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042673617] [2021-05-21 20:37:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:29,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:29,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042673617] [2021-05-21 20:37:29,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042673617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:29,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312600869] [2021-05-21 20:37:29,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:29,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:37:29,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:29,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:29,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312600869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:29,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:29,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:29,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953592769] [2021-05-21 20:37:29,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:29,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:29,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:29,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:29,311 INFO L87 Difference]: Start difference. First operand 28028 states and 105799 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2021-05-21 20:37:30,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:30,167 INFO L93 Difference]: Finished difference Result 54693 states and 194613 transitions. [2021-05-21 20:37:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 20:37:30,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 29 [2021-05-21 20:37:30,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:30,287 INFO L225 Difference]: With dead ends: 54693 [2021-05-21 20:37:30,287 INFO L226 Difference]: Without dead ends: 54103 [2021-05-21 20:37:30,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 461.0ms TimeCoverageRelationStatistics Valid=805, Invalid=2855, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 20:37:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54103 states. [2021-05-21 20:37:31,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54103 to 31277. [2021-05-21 20:37:31,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31277 states, 31276 states have (on average 3.7364432791917124) internal successors, (116861), 31276 states have internal predecessors, (116861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31277 states to 31277 states and 116861 transitions. [2021-05-21 20:37:31,121 INFO L78 Accepts]: Start accepts. Automaton has 31277 states and 116861 transitions. Word has length 29 [2021-05-21 20:37:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:31,122 INFO L482 AbstractCegarLoop]: Abstraction has 31277 states and 116861 transitions. [2021-05-21 20:37:31,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2021-05-21 20:37:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 31277 states and 116861 transitions. [2021-05-21 20:37:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:31,167 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:31,167 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:31,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:31,368 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash 816620900, now seen corresponding path program 91 times [2021-05-21 20:37:31,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:31,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728664622] [2021-05-21 20:37:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:31,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:31,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728664622] [2021-05-21 20:37:31,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728664622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:31,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232788393] [2021-05-21 20:37:31,399 INFO 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 [2021-05-21 20:37:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:31,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:31,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:31,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232788393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:31,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:31,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-05-21 20:37:31,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110685265] [2021-05-21 20:37:31,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:37:31,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:31,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:37:31,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:37:31,465 INFO L87 Difference]: Start difference. First operand 31277 states and 116861 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:31,727 INFO L93 Difference]: Finished difference Result 41400 states and 152146 transitions. [2021-05-21 20:37:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:37:31,727 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-21 20:37:31,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:31,813 INFO L225 Difference]: With dead ends: 41400 [2021-05-21 20:37:31,813 INFO L226 Difference]: Without dead ends: 41184 [2021-05-21 20:37:31,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:37:31,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41184 states. [2021-05-21 20:37:32,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41184 to 36746. [2021-05-21 20:37:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36746 states, 36745 states have (on average 3.781221934957137) internal successors, (138941), 36745 states have internal predecessors, (138941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:32,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36746 states to 36746 states and 138941 transitions. [2021-05-21 20:37:32,507 INFO L78 Accepts]: Start accepts. Automaton has 36746 states and 138941 transitions. Word has length 29 [2021-05-21 20:37:32,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:32,507 INFO L482 AbstractCegarLoop]: Abstraction has 36746 states and 138941 transitions. [2021-05-21 20:37:32,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:32,507 INFO L276 IsEmpty]: Start isEmpty. Operand 36746 states and 138941 transitions. [2021-05-21 20:37:32,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:32,562 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:32,562 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:32,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-21 20:37:32,762 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:32,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:32,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1324656412, now seen corresponding path program 92 times [2021-05-21 20:37:32,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:32,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191000774] [2021-05-21 20:37:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:32,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:32,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191000774] [2021-05-21 20:37:32,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191000774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:32,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931592442] [2021-05-21 20:37:32,788 INFO L93 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 [2021-05-21 20:37:32,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:32,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:32,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:32,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:37:33,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931592442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:33,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:33,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:37:33,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412310852] [2021-05-21 20:37:33,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:37:33,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:33,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:37:33,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:37:33,118 INFO L87 Difference]: Start difference. First operand 36746 states and 138941 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-05-21 20:37:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:34,256 INFO L93 Difference]: Finished difference Result 60231 states and 218468 transitions. [2021-05-21 20:37:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 20:37:34,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 29 [2021-05-21 20:37:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:34,410 INFO L225 Difference]: With dead ends: 60231 [2021-05-21 20:37:34,411 INFO L226 Difference]: Without dead ends: 59842 [2021-05-21 20:37:34,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=780, Invalid=2880, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 20:37:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59842 states. [2021-05-21 20:37:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59842 to 45321. [2021-05-21 20:37:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45321 states, 45320 states have (on average 3.791306266548985) internal successors, (171822), 45320 states have internal predecessors, (171822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45321 states to 45321 states and 171822 transitions. [2021-05-21 20:37:35,737 INFO L78 Accepts]: Start accepts. Automaton has 45321 states and 171822 transitions. Word has length 29 [2021-05-21 20:37:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:35,737 INFO L482 AbstractCegarLoop]: Abstraction has 45321 states and 171822 transitions. [2021-05-21 20:37:35,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-05-21 20:37:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 45321 states and 171822 transitions. [2021-05-21 20:37:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:35,808 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:35,808 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:36,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:36,009 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:36,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1852635552, now seen corresponding path program 93 times [2021-05-21 20:37:36,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:36,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103924987] [2021-05-21 20:37:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:36,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:36,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103924987] [2021-05-21 20:37:36,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103924987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:36,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042695505] [2021-05-21 20:37:36,190 INFO L93 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 [2021-05-21 20:37:36,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:37:36,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:36,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:36,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:37:36,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042695505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:36,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:36,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:37:36,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198599080] [2021-05-21 20:37:36,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:37:36,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:36,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:37:36,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:37:36,278 INFO L87 Difference]: Start difference. First operand 45321 states and 171822 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-05-21 20:37:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:37,215 INFO L93 Difference]: Finished difference Result 61448 states and 220290 transitions. [2021-05-21 20:37:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 20:37:37,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 29 [2021-05-21 20:37:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:37,366 INFO L225 Difference]: With dead ends: 61448 [2021-05-21 20:37:37,366 INFO L226 Difference]: Without dead ends: 61268 [2021-05-21 20:37:37,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 397.3ms TimeCoverageRelationStatistics Valid=767, Invalid=2893, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 20:37:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61268 states. [2021-05-21 20:37:38,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61268 to 46515. [2021-05-21 20:37:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46515 states, 46514 states have (on average 3.783893021455906) internal successors, (176004), 46514 states have internal predecessors, (176004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46515 states to 46515 states and 176004 transitions. [2021-05-21 20:37:38,892 INFO L78 Accepts]: Start accepts. Automaton has 46515 states and 176004 transitions. Word has length 29 [2021-05-21 20:37:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:38,892 INFO L482 AbstractCegarLoop]: Abstraction has 46515 states and 176004 transitions. [2021-05-21 20:37:38,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-05-21 20:37:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 46515 states and 176004 transitions. [2021-05-21 20:37:38,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:38,957 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:38,957 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:39,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-21 20:37:39,157 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:39,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:39,158 INFO L82 PathProgramCache]: Analyzing trace with hash -505873000, now seen corresponding path program 94 times [2021-05-21 20:37:39,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:39,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126890262] [2021-05-21 20:37:39,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:39,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:39,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126890262] [2021-05-21 20:37:39,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126890262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:39,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093401751] [2021-05-21 20:37:39,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:37:39,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:37:39,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:39,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:39,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 20:37:39,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093401751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:39,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:39,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:37:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602426443] [2021-05-21 20:37:39,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:37:39,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:39,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:37:39,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:37:39,234 INFO L87 Difference]: Start difference. First operand 46515 states and 176004 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-05-21 20:37:39,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:39,698 INFO L93 Difference]: Finished difference Result 58737 states and 220575 transitions. [2021-05-21 20:37:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:37:39,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 29 [2021-05-21 20:37:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:39,840 INFO L225 Difference]: With dead ends: 58737 [2021-05-21 20:37:39,840 INFO L226 Difference]: Without dead ends: 58715 [2021-05-21 20:37:39,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:37:39,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58715 states. [2021-05-21 20:37:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58715 to 54562. [2021-05-21 20:37:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54562 states, 54561 states have (on average 3.806143582412346) internal successors, (207667), 54561 states have internal predecessors, (207667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54562 states to 54562 states and 207667 transitions. [2021-05-21 20:37:41,238 INFO L78 Accepts]: Start accepts. Automaton has 54562 states and 207667 transitions. Word has length 29 [2021-05-21 20:37:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:41,238 INFO L482 AbstractCegarLoop]: Abstraction has 54562 states and 207667 transitions. [2021-05-21 20:37:41,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-05-21 20:37:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 54562 states and 207667 transitions. [2021-05-21 20:37:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:41,322 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:41,322 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:41,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-21 20:37:41,522 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:41,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2054404452, now seen corresponding path program 95 times [2021-05-21 20:37:41,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:41,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739943279] [2021-05-21 20:37:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:37:41,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:41,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739943279] [2021-05-21 20:37:41,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739943279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:41,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324564793] [2021-05-21 20:37:41,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:41,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:37:41,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:41,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:41,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:41,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324564793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:41,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:41,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:37:41,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138743410] [2021-05-21 20:37:41,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:37:41,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:37:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:37:41,629 INFO L87 Difference]: Start difference. First operand 54562 states and 207667 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-05-21 20:37:42,109 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-21 20:37:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:43,044 INFO L93 Difference]: Finished difference Result 79748 states and 284600 transitions. [2021-05-21 20:37:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-21 20:37:43,044 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 29 [2021-05-21 20:37:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:43,495 INFO L225 Difference]: With dead ends: 79748 [2021-05-21 20:37:43,495 INFO L226 Difference]: Without dead ends: 79619 [2021-05-21 20:37:43,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 847.5ms TimeCoverageRelationStatistics Valid=1227, Invalid=5093, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 20:37:43,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79619 states. [2021-05-21 20:37:44,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79619 to 55774. [2021-05-21 20:37:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55774 states, 55773 states have (on average 3.7706954978215266) internal successors, (210303), 55773 states have internal predecessors, (210303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:45,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55774 states to 55774 states and 210303 transitions. [2021-05-21 20:37:45,139 INFO L78 Accepts]: Start accepts. Automaton has 55774 states and 210303 transitions. Word has length 29 [2021-05-21 20:37:45,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:45,140 INFO L482 AbstractCegarLoop]: Abstraction has 55774 states and 210303 transitions. [2021-05-21 20:37:45,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-05-21 20:37:45,140 INFO L276 IsEmpty]: Start isEmpty. Operand 55774 states and 210303 transitions. [2021-05-21 20:37:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:45,222 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:45,222 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:45,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-21 20:37:45,422 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:45,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1716737040, now seen corresponding path program 96 times [2021-05-21 20:37:45,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:45,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224433643] [2021-05-21 20:37:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:45,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:45,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224433643] [2021-05-21 20:37:45,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224433643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:45,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905966418] [2021-05-21 20:37:45,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:45,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:37:45,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:45,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:45,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:45,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905966418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:45,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:45,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2021-05-21 20:37:45,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016509384] [2021-05-21 20:37:45,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:37:45,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:45,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:37:45,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:37:45,523 INFO L87 Difference]: Start difference. First operand 55774 states and 210303 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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) [2021-05-21 20:37:46,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:46,231 INFO L93 Difference]: Finished difference Result 60437 states and 224551 transitions. [2021-05-21 20:37:46,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:37:46,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 29 [2021-05-21 20:37:46,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:46,376 INFO L225 Difference]: With dead ends: 60437 [2021-05-21 20:37:46,376 INFO L226 Difference]: Without dead ends: 60405 [2021-05-21 20:37:46,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:37:46,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60405 states. [2021-05-21 20:37:47,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60405 to 49962. [2021-05-21 20:37:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49962 states, 49961 states have (on average 3.74323972698705) internal successors, (187016), 49961 states have internal predecessors, (187016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49962 states to 49962 states and 187016 transitions. [2021-05-21 20:37:47,608 INFO L78 Accepts]: Start accepts. Automaton has 49962 states and 187016 transitions. Word has length 29 [2021-05-21 20:37:47,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:47,608 INFO L482 AbstractCegarLoop]: Abstraction has 49962 states and 187016 transitions. [2021-05-21 20:37:47,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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) [2021-05-21 20:37:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 49962 states and 187016 transitions. [2021-05-21 20:37:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:47,975 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:47,975 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:48,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:48,197 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:48,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1220322522, now seen corresponding path program 97 times [2021-05-21 20:37:48,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:48,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046975353] [2021-05-21 20:37:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:48,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:48,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046975353] [2021-05-21 20:37:48,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046975353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:48,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956587547] [2021-05-21 20:37:48,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:48,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:48,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:37:48,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956587547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:48,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:48,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-21 20:37:48,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251690732] [2021-05-21 20:37:48,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:37:48,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:48,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:37:48,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:37:48,283 INFO L87 Difference]: Start difference. First operand 49962 states and 187016 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-05-21 20:37:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:48,620 INFO L93 Difference]: Finished difference Result 60595 states and 223581 transitions. [2021-05-21 20:37:48,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:37:48,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 29 [2021-05-21 20:37:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:48,774 INFO L225 Difference]: With dead ends: 60595 [2021-05-21 20:37:48,774 INFO L226 Difference]: Without dead ends: 60532 [2021-05-21 20:37:48,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:37:48,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60532 states. [2021-05-21 20:37:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60532 to 55220. [2021-05-21 20:37:49,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55220 states, 55219 states have (on average 3.765171408392039) internal successors, (207909), 55219 states have internal predecessors, (207909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55220 states to 55220 states and 207909 transitions. [2021-05-21 20:37:50,483 INFO L78 Accepts]: Start accepts. Automaton has 55220 states and 207909 transitions. Word has length 29 [2021-05-21 20:37:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:50,483 INFO L482 AbstractCegarLoop]: Abstraction has 55220 states and 207909 transitions. [2021-05-21 20:37:50,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-05-21 20:37:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 55220 states and 207909 transitions. [2021-05-21 20:37:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:50,557 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:50,557 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:50,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-21 20:37:50,759 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:50,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:50,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1949620774, now seen corresponding path program 98 times [2021-05-21 20:37:50,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:50,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351244954] [2021-05-21 20:37:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:50,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:50,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351244954] [2021-05-21 20:37:50,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351244954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:50,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998500205] [2021-05-21 20:37:50,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:50,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:50,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:50,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:37:50,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998500205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:50,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:50,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:37:50,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518233078] [2021-05-21 20:37:50,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:37:50,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:50,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:37:50,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:37:50,851 INFO L87 Difference]: Start difference. First operand 55220 states and 207909 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2021-05-21 20:37:51,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:51,700 INFO L93 Difference]: Finished difference Result 66898 states and 242065 transitions. [2021-05-21 20:37:51,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 20:37:51,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 29 [2021-05-21 20:37:51,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:51,860 INFO L225 Difference]: With dead ends: 66898 [2021-05-21 20:37:51,860 INFO L226 Difference]: Without dead ends: 66524 [2021-05-21 20:37:51,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 20:37:52,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66524 states. [2021-05-21 20:37:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66524 to 50787. [2021-05-21 20:37:53,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50787 states, 50786 states have (on average 3.7521167250817156) internal successors, (190555), 50786 states have internal predecessors, (190555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50787 states to 50787 states and 190555 transitions. [2021-05-21 20:37:53,379 INFO L78 Accepts]: Start accepts. Automaton has 50787 states and 190555 transitions. Word has length 29 [2021-05-21 20:37:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:53,379 INFO L482 AbstractCegarLoop]: Abstraction has 50787 states and 190555 transitions. [2021-05-21 20:37:53,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2021-05-21 20:37:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 50787 states and 190555 transitions. [2021-05-21 20:37:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:53,452 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:53,452 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:53,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:53,653 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:53,653 INFO L82 PathProgramCache]: Analyzing trace with hash -315726062, now seen corresponding path program 99 times [2021-05-21 20:37:53,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:53,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470581619] [2021-05-21 20:37:53,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:53,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:53,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470581619] [2021-05-21 20:37:53,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470581619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:53,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873822240] [2021-05-21 20:37:53,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:53,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:37:53,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:53,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:53,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:37:53,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873822240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:53,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:53,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-21 20:37:53,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969131980] [2021-05-21 20:37:53,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:37:53,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:53,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:37:53,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:37:53,756 INFO L87 Difference]: Start difference. First operand 50787 states and 190555 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-05-21 20:37:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:55,067 INFO L93 Difference]: Finished difference Result 100609 states and 369514 transitions. [2021-05-21 20:37:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 20:37:55,067 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 29 [2021-05-21 20:37:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:55,395 INFO L225 Difference]: With dead ends: 100609 [2021-05-21 20:37:55,395 INFO L226 Difference]: Without dead ends: 100210 [2021-05-21 20:37:55,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 20:37:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100210 states. [2021-05-21 20:37:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100210 to 73794. [2021-05-21 20:37:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73794 states, 73793 states have (on average 3.8082744975810714) internal successors, (281024), 73793 states have internal predecessors, (281024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73794 states to 73794 states and 281024 transitions. [2021-05-21 20:37:57,708 INFO L78 Accepts]: Start accepts. Automaton has 73794 states and 281024 transitions. Word has length 29 [2021-05-21 20:37:57,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:57,709 INFO L482 AbstractCegarLoop]: Abstraction has 73794 states and 281024 transitions. [2021-05-21 20:37:57,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-05-21 20:37:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 73794 states and 281024 transitions. [2021-05-21 20:37:57,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:37:57,817 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:57,817 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:58,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-21 20:37:58,019 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:58,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:58,019 INFO L82 PathProgramCache]: Analyzing trace with hash 471519794, now seen corresponding path program 100 times [2021-05-21 20:37:58,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:58,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57372166] [2021-05-21 20:37:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:37:58,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:58,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57372166] [2021-05-21 20:37:58,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57372166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:58,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457482161] [2021-05-21 20:37:58,041 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 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 [2021-05-21 20:37:58,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:37:58,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:58,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:37:58,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:37:58,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457482161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:58,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:58,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-21 20:37:58,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918926738] [2021-05-21 20:37:58,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:37:58,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:58,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:37:58,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:37:58,113 INFO L87 Difference]: Start difference. First operand 73794 states and 281024 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-05-21 20:37:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:59,537 INFO L93 Difference]: Finished difference Result 102298 states and 373018 transitions. [2021-05-21 20:37:59,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 20:37:59,538 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 29 [2021-05-21 20:37:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:59,818 INFO L225 Difference]: With dead ends: 102298 [2021-05-21 20:37:59,818 INFO L226 Difference]: Without dead ends: 101158 [2021-05-21 20:37:59,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=821, Invalid=2961, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 20:37:59,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101158 states. [2021-05-21 20:38:01,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101158 to 73287. [2021-05-21 20:38:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73287 states, 73286 states have (on average 3.7827825232650163) internal successors, (277225), 73286 states have internal predecessors, (277225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73287 states to 73287 states and 277225 transitions. [2021-05-21 20:38:02,075 INFO L78 Accepts]: Start accepts. Automaton has 73287 states and 277225 transitions. Word has length 29 [2021-05-21 20:38:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:02,075 INFO L482 AbstractCegarLoop]: Abstraction has 73287 states and 277225 transitions. [2021-05-21 20:38:02,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-05-21 20:38:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 73287 states and 277225 transitions. [2021-05-21 20:38:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:02,179 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:02,179 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:02,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:02,379 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:02,380 INFO L82 PathProgramCache]: Analyzing trace with hash 353639198, now seen corresponding path program 101 times [2021-05-21 20:38:02,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:02,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986957758] [2021-05-21 20:38:02,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:02,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:02,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986957758] [2021-05-21 20:38:02,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986957758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:02,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939353427] [2021-05-21 20:38:02,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:02,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:38:02,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:02,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:02,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:02,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939353427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:02,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:02,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-21 20:38:02,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885512427] [2021-05-21 20:38:02,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:38:02,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:02,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:38:02,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:38:02,475 INFO L87 Difference]: Start difference. First operand 73287 states and 277225 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-05-21 20:38:02,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:02,902 INFO L93 Difference]: Finished difference Result 82707 states and 304326 transitions. [2021-05-21 20:38:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:38:02,902 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 29 [2021-05-21 20:38:02,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:03,657 INFO L225 Difference]: With dead ends: 82707 [2021-05-21 20:38:03,657 INFO L226 Difference]: Without dead ends: 82617 [2021-05-21 20:38:03,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:38:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82617 states. [2021-05-21 20:38:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82617 to 73144. [2021-05-21 20:38:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73144 states, 73143 states have (on average 3.754234855010049) internal successors, (274596), 73143 states have internal predecessors, (274596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73144 states to 73144 states and 274596 transitions. [2021-05-21 20:38:05,194 INFO L78 Accepts]: Start accepts. Automaton has 73144 states and 274596 transitions. Word has length 29 [2021-05-21 20:38:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:05,194 INFO L482 AbstractCegarLoop]: Abstraction has 73144 states and 274596 transitions. [2021-05-21 20:38:05,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-05-21 20:38:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand 73144 states and 274596 transitions. [2021-05-21 20:38:05,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:05,303 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:05,303 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:05,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:05,504 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:05,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1372869486, now seen corresponding path program 102 times [2021-05-21 20:38:05,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:05,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430981156] [2021-05-21 20:38:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:05,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:05,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430981156] [2021-05-21 20:38:05,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430981156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:05,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120746989] [2021-05-21 20:38:05,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:38:05,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:38:05,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:05,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:05,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:38:05,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120746989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:05,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:05,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-21 20:38:05,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098812927] [2021-05-21 20:38:05,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:38:05,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:05,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:38:05,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:38:05,638 INFO L87 Difference]: Start difference. First operand 73144 states and 274596 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-05-21 20:38:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:07,288 INFO L93 Difference]: Finished difference Result 90454 states and 327992 transitions. [2021-05-21 20:38:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-21 20:38:07,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 29 [2021-05-21 20:38:07,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:07,530 INFO L225 Difference]: With dead ends: 90454 [2021-05-21 20:38:07,530 INFO L226 Difference]: Without dead ends: 89724 [2021-05-21 20:38:07,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 589.1ms TimeCoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 20:38:07,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89724 states. [2021-05-21 20:38:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89724 to 72523. [2021-05-21 20:38:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72523 states, 72522 states have (on average 3.7569427208295414) internal successors, (272461), 72522 states have internal predecessors, (272461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72523 states to 72523 states and 272461 transitions. [2021-05-21 20:38:09,739 INFO L78 Accepts]: Start accepts. Automaton has 72523 states and 272461 transitions. Word has length 29 [2021-05-21 20:38:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:09,739 INFO L482 AbstractCegarLoop]: Abstraction has 72523 states and 272461 transitions. [2021-05-21 20:38:09,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-05-21 20:38:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 72523 states and 272461 transitions. [2021-05-21 20:38:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:09,841 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:09,841 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:10,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-05-21 20:38:10,042 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:10,042 INFO L82 PathProgramCache]: Analyzing trace with hash 351112822, now seen corresponding path program 103 times [2021-05-21 20:38:10,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:10,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179554757] [2021-05-21 20:38:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:10,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:10,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179554757] [2021-05-21 20:38:10,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179554757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:10,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617989574] [2021-05-21 20:38:10,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:38:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:10,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:10,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:38:10,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617989574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:10,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:10,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:38:10,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688442571] [2021-05-21 20:38:10,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:38:10,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:10,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:38:10,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:38:10,115 INFO L87 Difference]: Start difference. First operand 72523 states and 272461 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-05-21 20:38:10,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:10,533 INFO L93 Difference]: Finished difference Result 85882 states and 320374 transitions. [2021-05-21 20:38:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:38:10,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2021-05-21 20:38:10,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:10,741 INFO L225 Difference]: With dead ends: 85882 [2021-05-21 20:38:10,742 INFO L226 Difference]: Without dead ends: 85852 [2021-05-21 20:38:10,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:38:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85852 states. [2021-05-21 20:38:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85852 to 81497. [2021-05-21 20:38:12,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81497 states, 81496 states have (on average 3.7722342200844214) internal successors, (307422), 81496 states have internal predecessors, (307422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81497 states to 81497 states and 307422 transitions. [2021-05-21 20:38:12,980 INFO L78 Accepts]: Start accepts. Automaton has 81497 states and 307422 transitions. Word has length 29 [2021-05-21 20:38:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:12,980 INFO L482 AbstractCegarLoop]: Abstraction has 81497 states and 307422 transitions. [2021-05-21 20:38:12,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-05-21 20:38:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 81497 states and 307422 transitions. [2021-05-21 20:38:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:13,112 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:13,112 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:13,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-21 20:38:13,313 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:13,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1495713142, now seen corresponding path program 104 times [2021-05-21 20:38:13,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:13,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727440970] [2021-05-21 20:38:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:13,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:13,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727440970] [2021-05-21 20:38:13,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727440970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:13,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502690695] [2021-05-21 20:38:13,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:38:13,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:38:13,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:13,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:13,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:38:13,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502690695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:13,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:13,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:38:13,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045516582] [2021-05-21 20:38:13,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:38:13,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:13,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:38:13,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:38:13,395 INFO L87 Difference]: Start difference. First operand 81497 states and 307422 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-05-21 20:38:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:13,865 INFO L93 Difference]: Finished difference Result 90964 states and 338142 transitions. [2021-05-21 20:38:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:38:13,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2021-05-21 20:38:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:14,634 INFO L225 Difference]: With dead ends: 90964 [2021-05-21 20:38:14,635 INFO L226 Difference]: Without dead ends: 90951 [2021-05-21 20:38:14,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:38:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90951 states. [2021-05-21 20:38:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90951 to 81689. [2021-05-21 20:38:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81689 states, 81688 states have (on average 3.771067965919107) internal successors, (308051), 81688 states have internal predecessors, (308051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81689 states to 81689 states and 308051 transitions. [2021-05-21 20:38:16,380 INFO L78 Accepts]: Start accepts. Automaton has 81689 states and 308051 transitions. Word has length 29 [2021-05-21 20:38:16,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:16,381 INFO L482 AbstractCegarLoop]: Abstraction has 81689 states and 308051 transitions. [2021-05-21 20:38:16,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-05-21 20:38:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 81689 states and 308051 transitions. [2021-05-21 20:38:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:16,504 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:16,504 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:16,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:16,705 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash 22394150, now seen corresponding path program 105 times [2021-05-21 20:38:16,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:16,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918248181] [2021-05-21 20:38:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:38:16,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:16,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918248181] [2021-05-21 20:38:16,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918248181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:16,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821498862] [2021-05-21 20:38:16,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:16,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:38:16,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:16,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:16,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:16,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821498862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:16,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:16,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:38:16,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783288440] [2021-05-21 20:38:16,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:38:16,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:38:16,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:38:16,804 INFO L87 Difference]: Start difference. First operand 81689 states and 308051 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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) [2021-05-21 20:38:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:18,427 INFO L93 Difference]: Finished difference Result 117029 states and 423344 transitions. [2021-05-21 20:38:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 20:38:18,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 29 [2021-05-21 20:38:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:18,753 INFO L225 Difference]: With dead ends: 117029 [2021-05-21 20:38:18,753 INFO L226 Difference]: Without dead ends: 116821 [2021-05-21 20:38:18,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=957, Invalid=3873, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 20:38:18,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116821 states. [2021-05-21 20:38:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116821 to 82052. [2021-05-21 20:38:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82052 states, 82051 states have (on average 3.7600882378033176) internal successors, (308519), 82051 states have internal predecessors, (308519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82052 states to 82052 states and 308519 transitions. [2021-05-21 20:38:21,373 INFO L78 Accepts]: Start accepts. Automaton has 82052 states and 308519 transitions. Word has length 29 [2021-05-21 20:38:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:21,373 INFO L482 AbstractCegarLoop]: Abstraction has 82052 states and 308519 transitions. [2021-05-21 20:38:21,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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) [2021-05-21 20:38:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 82052 states and 308519 transitions. [2021-05-21 20:38:21,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:21,491 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:21,491 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:21,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-21 20:38:21,692 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:21,692 INFO L82 PathProgramCache]: Analyzing trace with hash 954640786, now seen corresponding path program 106 times [2021-05-21 20:38:21,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:21,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488251507] [2021-05-21 20:38:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:21,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:21,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488251507] [2021-05-21 20:38:21,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488251507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:21,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363835686] [2021-05-21 20:38:21,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:21,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:38:21,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:21,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:21,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:38:21,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363835686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:21,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:21,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-21 20:38:21,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097167780] [2021-05-21 20:38:21,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:38:21,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:21,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:38:21,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:38:21,809 INFO L87 Difference]: Start difference. First operand 82052 states and 308519 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-05-21 20:38:22,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:22,266 INFO L93 Difference]: Finished difference Result 86807 states and 321949 transitions. [2021-05-21 20:38:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:38:22,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 29 [2021-05-21 20:38:22,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:23,064 INFO L225 Difference]: With dead ends: 86807 [2021-05-21 20:38:23,065 INFO L226 Difference]: Without dead ends: 86624 [2021-05-21 20:38:23,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:38:23,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86624 states. [2021-05-21 20:38:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86624 to 81742. [2021-05-21 20:38:24,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81742 states, 81741 states have (on average 3.760120380225346) internal successors, (307356), 81741 states have internal predecessors, (307356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81742 states to 81742 states and 307356 transitions. [2021-05-21 20:38:24,760 INFO L78 Accepts]: Start accepts. Automaton has 81742 states and 307356 transitions. Word has length 29 [2021-05-21 20:38:24,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:24,760 INFO L482 AbstractCegarLoop]: Abstraction has 81742 states and 307356 transitions. [2021-05-21 20:38:24,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-05-21 20:38:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 81742 states and 307356 transitions. [2021-05-21 20:38:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:24,900 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:24,900 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:25,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-21 20:38:25,101 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:25,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1306191286, now seen corresponding path program 107 times [2021-05-21 20:38:25,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:25,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911663672] [2021-05-21 20:38:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:25,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:25,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911663672] [2021-05-21 20:38:25,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911663672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:25,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020419211] [2021-05-21 20:38:25,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:25,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:38:25,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:25,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:25,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:25,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020419211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:25,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:25,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-21 20:38:25,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269280191] [2021-05-21 20:38:25,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:38:25,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:25,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:38:25,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:38:25,212 INFO L87 Difference]: Start difference. First operand 81742 states and 307356 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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) [2021-05-21 20:38:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:26,457 INFO L93 Difference]: Finished difference Result 105120 states and 389933 transitions. [2021-05-21 20:38:26,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:38:26,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 29 [2021-05-21 20:38:26,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:26,790 INFO L225 Difference]: With dead ends: 105120 [2021-05-21 20:38:26,790 INFO L226 Difference]: Without dead ends: 104966 [2021-05-21 20:38:26,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:38:26,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104966 states. [2021-05-21 20:38:28,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104966 to 90971. [2021-05-21 20:38:28,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90971 states, 90970 states have (on average 3.763823238430252) internal successors, (342395), 90970 states have internal predecessors, (342395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:29,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90971 states to 90971 states and 342395 transitions. [2021-05-21 20:38:29,589 INFO L78 Accepts]: Start accepts. Automaton has 90971 states and 342395 transitions. Word has length 29 [2021-05-21 20:38:29,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:29,589 INFO L482 AbstractCegarLoop]: Abstraction has 90971 states and 342395 transitions. [2021-05-21 20:38:29,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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) [2021-05-21 20:38:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 90971 states and 342395 transitions. [2021-05-21 20:38:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:29,764 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:29,764 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:29,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-21 20:38:29,964 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:29,964 INFO L82 PathProgramCache]: Analyzing trace with hash -136054070, now seen corresponding path program 108 times [2021-05-21 20:38:29,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:29,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820284745] [2021-05-21 20:38:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:29,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:29,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820284745] [2021-05-21 20:38:29,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820284745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:29,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734825075] [2021-05-21 20:38:29,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:30,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:38:30,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:30,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:30,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:38:30,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734825075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:30,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:30,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-05-21 20:38:30,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795857361] [2021-05-21 20:38:30,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:38:30,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:30,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:38:30,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:38:30,076 INFO L87 Difference]: Start difference. First operand 90971 states and 342395 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2021-05-21 20:38:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:31,877 INFO L93 Difference]: Finished difference Result 124333 states and 441738 transitions. [2021-05-21 20:38:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-21 20:38:31,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 29 [2021-05-21 20:38:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:32,193 INFO L225 Difference]: With dead ends: 124333 [2021-05-21 20:38:32,194 INFO L226 Difference]: Without dead ends: 124126 [2021-05-21 20:38:32,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=1215, Invalid=4335, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 20:38:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124126 states. [2021-05-21 20:38:33,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124126 to 81617. [2021-05-21 20:38:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81617 states, 81616 states have (on average 3.7307023132719075) internal successors, (304485), 81616 states have internal predecessors, (304485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:34,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81617 states to 81617 states and 304485 transitions. [2021-05-21 20:38:34,327 INFO L78 Accepts]: Start accepts. Automaton has 81617 states and 304485 transitions. Word has length 29 [2021-05-21 20:38:34,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:34,327 INFO L482 AbstractCegarLoop]: Abstraction has 81617 states and 304485 transitions. [2021-05-21 20:38:34,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2021-05-21 20:38:34,327 INFO L276 IsEmpty]: Start isEmpty. Operand 81617 states and 304485 transitions. [2021-05-21 20:38:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:34,930 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:34,930 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:35,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:35,152 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:35,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:35,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2042862942, now seen corresponding path program 109 times [2021-05-21 20:38:35,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:35,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127756839] [2021-05-21 20:38:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:35,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:35,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127756839] [2021-05-21 20:38:35,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127756839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:35,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826490810] [2021-05-21 20:38:35,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:35,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:35,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:38:35,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826490810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:35,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:35,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-05-21 20:38:35,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061406082] [2021-05-21 20:38:35,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:38:35,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:35,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:38:35,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:38:35,237 INFO L87 Difference]: Start difference. First operand 81617 states and 304485 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) 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) [2021-05-21 20:38:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:35,849 INFO L93 Difference]: Finished difference Result 104858 states and 384069 transitions. [2021-05-21 20:38:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:38:35,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) 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 29 [2021-05-21 20:38:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:36,138 INFO L225 Difference]: With dead ends: 104858 [2021-05-21 20:38:36,138 INFO L226 Difference]: Without dead ends: 104830 [2021-05-21 20:38:36,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:38:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104830 states. [2021-05-21 20:38:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104830 to 80598. [2021-05-21 20:38:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80598 states, 80597 states have (on average 3.718897725721801) internal successors, (299732), 80597 states have internal predecessors, (299732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80598 states to 80598 states and 299732 transitions. [2021-05-21 20:38:38,632 INFO L78 Accepts]: Start accepts. Automaton has 80598 states and 299732 transitions. Word has length 29 [2021-05-21 20:38:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:38,633 INFO L482 AbstractCegarLoop]: Abstraction has 80598 states and 299732 transitions. [2021-05-21 20:38:38,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) 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) [2021-05-21 20:38:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 80598 states and 299732 transitions. [2021-05-21 20:38:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:38,750 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:38,750 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:38,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-21 20:38:38,951 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:38,952 INFO L82 PathProgramCache]: Analyzing trace with hash 99679966, now seen corresponding path program 110 times [2021-05-21 20:38:38,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:38,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57339641] [2021-05-21 20:38:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:38,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:38,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57339641] [2021-05-21 20:38:38,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57339641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:38,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017935254] [2021-05-21 20:38:38,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:38:38,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:38:38,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:39,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:39,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 20:38:39,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017935254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:39,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:39,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-21 20:38:39,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126702049] [2021-05-21 20:38:39,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:38:39,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:39,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:38:39,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:38:39,050 INFO L87 Difference]: Start difference. First operand 80598 states and 299732 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-05-21 20:38:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:40,877 INFO L93 Difference]: Finished difference Result 120372 states and 431223 transitions. [2021-05-21 20:38:40,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 20:38:40,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 29 [2021-05-21 20:38:40,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:41,506 INFO L225 Difference]: With dead ends: 120372 [2021-05-21 20:38:41,506 INFO L226 Difference]: Without dead ends: 120022 [2021-05-21 20:38:41,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 385.8ms TimeCoverageRelationStatistics Valid=699, Invalid=2493, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 20:38:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120022 states. [2021-05-21 20:38:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120022 to 96150. [2021-05-21 20:38:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96150 states, 96149 states have (on average 3.740330112637677) internal successors, (359629), 96149 states have internal predecessors, (359629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:44,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96150 states to 96150 states and 359629 transitions. [2021-05-21 20:38:44,253 INFO L78 Accepts]: Start accepts. Automaton has 96150 states and 359629 transitions. Word has length 29 [2021-05-21 20:38:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:44,253 INFO L482 AbstractCegarLoop]: Abstraction has 96150 states and 359629 transitions. [2021-05-21 20:38:44,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-05-21 20:38:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 96150 states and 359629 transitions. [2021-05-21 20:38:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:44,416 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:44,417 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:44,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-21 20:38:44,628 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:44,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:44,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1163429594, now seen corresponding path program 111 times [2021-05-21 20:38:44,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:44,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755385489] [2021-05-21 20:38:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:44,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:44,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755385489] [2021-05-21 20:38:44,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755385489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:44,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158631484] [2021-05-21 20:38:44,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:44,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:38:44,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:44,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:44,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-21 20:38:44,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158631484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:44,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:44,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-21 20:38:44,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329354773] [2021-05-21 20:38:44,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:38:44,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:38:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:38:44,727 INFO L87 Difference]: Start difference. First operand 96150 states and 359629 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-05-21 20:38:46,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:46,591 INFO L93 Difference]: Finished difference Result 158751 states and 577161 transitions. [2021-05-21 20:38:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 20:38:46,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 29 [2021-05-21 20:38:46,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:47,044 INFO L225 Difference]: With dead ends: 158751 [2021-05-21 20:38:47,044 INFO L226 Difference]: Without dead ends: 157945 [2021-05-21 20:38:47,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 426.1ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 20:38:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157945 states. [2021-05-21 20:38:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157945 to 113836. [2021-05-21 20:38:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113836 states, 113835 states have (on average 3.7557693152369658) internal successors, (427538), 113835 states have internal predecessors, (427538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113836 states to 113836 states and 427538 transitions. [2021-05-21 20:38:50,056 INFO L78 Accepts]: Start accepts. Automaton has 113836 states and 427538 transitions. Word has length 29 [2021-05-21 20:38:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:50,056 INFO L482 AbstractCegarLoop]: Abstraction has 113836 states and 427538 transitions. [2021-05-21 20:38:50,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-05-21 20:38:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 113836 states and 427538 transitions. [2021-05-21 20:38:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:50,216 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:50,216 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:50,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:50,416 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:50,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:50,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1318670174, now seen corresponding path program 112 times [2021-05-21 20:38:50,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:50,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065632141] [2021-05-21 20:38:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:50,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:50,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065632141] [2021-05-21 20:38:50,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065632141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:50,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982202841] [2021-05-21 20:38:50,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:50,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:38:50,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:50,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:50,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:38:50,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982202841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:50,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:50,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 20:38:50,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253523403] [2021-05-21 20:38:50,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:38:50,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:50,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:38:50,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:38:50,491 INFO L87 Difference]: Start difference. First operand 113836 states and 427538 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-05-21 20:38:51,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:51,623 INFO L93 Difference]: Finished difference Result 124805 states and 462681 transitions. [2021-05-21 20:38:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:38:51,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 29 [2021-05-21 20:38:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:52,017 INFO L225 Difference]: With dead ends: 124805 [2021-05-21 20:38:52,018 INFO L226 Difference]: Without dead ends: 124469 [2021-05-21 20:38:52,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:38:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124469 states. [2021-05-21 20:38:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124469 to 117136. [2021-05-21 20:38:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117136 states, 117135 states have (on average 3.760541255815939) internal successors, (440491), 117135 states have internal predecessors, (440491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117136 states to 117136 states and 440491 transitions. [2021-05-21 20:38:54,928 INFO L78 Accepts]: Start accepts. Automaton has 117136 states and 440491 transitions. Word has length 29 [2021-05-21 20:38:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:54,928 INFO L482 AbstractCegarLoop]: Abstraction has 117136 states and 440491 transitions. [2021-05-21 20:38:54,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-05-21 20:38:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 117136 states and 440491 transitions. [2021-05-21 20:38:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:38:55,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:55,089 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:55,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:55,290 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:55,290 INFO L82 PathProgramCache]: Analyzing trace with hash -190689630, now seen corresponding path program 113 times [2021-05-21 20:38:55,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:55,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383532355] [2021-05-21 20:38:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:55,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:55,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383532355] [2021-05-21 20:38:55,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383532355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:55,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448076653] [2021-05-21 20:38:55,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:38:55,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:38:55,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:38:55,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:38:55,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448076653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:55,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:55,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:38:55,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842695861] [2021-05-21 20:38:55,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:38:55,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:55,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:38:55,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:38:55,381 INFO L87 Difference]: Start difference. First operand 117136 states and 440491 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-05-21 20:38:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:56,583 INFO L93 Difference]: Finished difference Result 131593 states and 486537 transitions. [2021-05-21 20:38:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:38:56,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2021-05-21 20:38:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:56,984 INFO L225 Difference]: With dead ends: 131593 [2021-05-21 20:38:56,984 INFO L226 Difference]: Without dead ends: 131578 [2021-05-21 20:38:56,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:38:57,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131578 states. [2021-05-21 20:38:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131578 to 118035. [2021-05-21 20:38:59,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118035 states, 118034 states have (on average 3.757493603537964) internal successors, (443512), 118034 states have internal predecessors, (443512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118035 states to 118035 states and 443512 transitions. [2021-05-21 20:38:59,880 INFO L78 Accepts]: Start accepts. Automaton has 118035 states and 443512 transitions. Word has length 29 [2021-05-21 20:38:59,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:59,880 INFO L482 AbstractCegarLoop]: Abstraction has 118035 states and 443512 transitions. [2021-05-21 20:38:59,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-05-21 20:38:59,881 INFO L276 IsEmpty]: Start isEmpty. Operand 118035 states and 443512 transitions. [2021-05-21 20:39:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:39:00,043 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:00,043 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:00,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:00,243 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:00,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:00,243 INFO L82 PathProgramCache]: Analyzing trace with hash 68105694, now seen corresponding path program 114 times [2021-05-21 20:39:00,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:00,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422818733] [2021-05-21 20:39:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:39:00,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:00,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422818733] [2021-05-21 20:39:00,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422818733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:00,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777536404] [2021-05-21 20:39:00,267 INFO L93 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 [2021-05-21 20:39:00,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:39:00,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:00,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:39:00,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:39:00,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777536404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:00,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:00,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-21 20:39:00,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321678339] [2021-05-21 20:39:00,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:39:00,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:00,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:39:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:39:00,348 INFO L87 Difference]: Start difference. First operand 118035 states and 443512 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-05-21 20:39:02,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:02,314 INFO L93 Difference]: Finished difference Result 162417 states and 578150 transitions. [2021-05-21 20:39:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-21 20:39:02,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 29 [2021-05-21 20:39:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:02,740 INFO L225 Difference]: With dead ends: 162417 [2021-05-21 20:39:02,741 INFO L226 Difference]: Without dead ends: 162210 [2021-05-21 20:39:02,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 1047.2ms TimeCoverageRelationStatistics Valid=1397, Invalid=4609, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 20:39:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162210 states. [2021-05-21 20:39:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162210 to 119675. [2021-05-21 20:39:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119675 states, 119674 states have (on average 3.739550779617962) internal successors, (447527), 119674 states have internal predecessors, (447527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119675 states to 119675 states and 447527 transitions. [2021-05-21 20:39:06,652 INFO L78 Accepts]: Start accepts. Automaton has 119675 states and 447527 transitions. Word has length 29 [2021-05-21 20:39:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:06,652 INFO L482 AbstractCegarLoop]: Abstraction has 119675 states and 447527 transitions. [2021-05-21 20:39:06,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-05-21 20:39:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 119675 states and 447527 transitions. [2021-05-21 20:39:06,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:39:06,819 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:06,819 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:07,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:07,019 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:07,020 INFO L82 PathProgramCache]: Analyzing trace with hash 218777654, now seen corresponding path program 115 times [2021-05-21 20:39:07,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:07,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480537278] [2021-05-21 20:39:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:39:07,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:07,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480537278] [2021-05-21 20:39:07,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480537278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:07,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822569104] [2021-05-21 20:39:07,043 INFO 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 [2021-05-21 20:39:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:07,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:39:07,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:39:07,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822569104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:07,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:07,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:39:07,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481028948] [2021-05-21 20:39:07,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:39:07,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:07,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:39:07,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:39:07,096 INFO L87 Difference]: Start difference. First operand 119675 states and 447527 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-05-21 20:39:07,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:07,723 INFO L93 Difference]: Finished difference Result 135149 states and 501662 transitions. [2021-05-21 20:39:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:39:07,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 29 [2021-05-21 20:39:07,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:08,725 INFO L225 Difference]: With dead ends: 135149 [2021-05-21 20:39:08,725 INFO L226 Difference]: Without dead ends: 135117 [2021-05-21 20:39:08,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:39:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135117 states. [2021-05-21 20:39:10,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135117 to 129535. [2021-05-21 20:39:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129535 states, 129534 states have (on average 3.746946747572066) internal successors, (485357), 129534 states have internal predecessors, (485357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129535 states to 129535 states and 485357 transitions. [2021-05-21 20:39:11,701 INFO L78 Accepts]: Start accepts. Automaton has 129535 states and 485357 transitions. Word has length 29 [2021-05-21 20:39:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:11,701 INFO L482 AbstractCegarLoop]: Abstraction has 129535 states and 485357 transitions. [2021-05-21 20:39:11,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-05-21 20:39:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 129535 states and 485357 transitions. [2021-05-21 20:39:11,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:39:11,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:11,887 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:12,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-21 20:39:12,108 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:12,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:12,109 INFO L82 PathProgramCache]: Analyzing trace with hash 512401842, now seen corresponding path program 116 times [2021-05-21 20:39:12,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:12,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695853732] [2021-05-21 20:39:12,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:39:12,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:12,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695853732] [2021-05-21 20:39:12,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695853732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:12,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925725575] [2021-05-21 20:39:12,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:39:12,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:12,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:12,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:39:12,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:39:12,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925725575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:12,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:12,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 20:39:12,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345421204] [2021-05-21 20:39:12,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:39:12,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:12,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:39:12,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:39:12,190 INFO L87 Difference]: Start difference. First operand 129535 states and 485357 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-05-21 20:39:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:13,501 INFO L93 Difference]: Finished difference Result 143528 states and 531160 transitions. [2021-05-21 20:39:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:39:13,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 29 [2021-05-21 20:39:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:13,962 INFO L225 Difference]: With dead ends: 143528 [2021-05-21 20:39:13,962 INFO L226 Difference]: Without dead ends: 143516 [2021-05-21 20:39:13,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:39:14,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143516 states. [2021-05-21 20:39:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143516 to 130136. [2021-05-21 20:39:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130136 states, 130135 states have (on average 3.7450416874783876) internal successors, (487361), 130135 states have internal predecessors, (487361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130136 states to 130136 states and 487361 transitions. [2021-05-21 20:39:17,079 INFO L78 Accepts]: Start accepts. Automaton has 130136 states and 487361 transitions. Word has length 29 [2021-05-21 20:39:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:17,079 INFO L482 AbstractCegarLoop]: Abstraction has 130136 states and 487361 transitions. [2021-05-21 20:39:17,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-05-21 20:39:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 130136 states and 487361 transitions. [2021-05-21 20:39:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:39:17,278 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:17,278 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:17,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-21 20:39:17,478 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:17,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:17,479 INFO L82 PathProgramCache]: Analyzing trace with hash 677507946, now seen corresponding path program 117 times [2021-05-21 20:39:17,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:17,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642165930] [2021-05-21 20:39:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:17,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:17,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642165930] [2021-05-21 20:39:17,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642165930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:17,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086505032] [2021-05-21 20:39:17,504 INFO L93 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 [2021-05-21 20:39:17,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:39:17,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:17,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:39:17,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:39:17,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086505032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:17,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:17,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:39:17,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784235652] [2021-05-21 20:39:17,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:39:17,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:17,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:39:17,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:39:17,582 INFO L87 Difference]: Start difference. First operand 130136 states and 487361 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-05-21 20:39:19,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:19,303 INFO L93 Difference]: Finished difference Result 158841 states and 570866 transitions. [2021-05-21 20:39:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 20:39:19,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 29 [2021-05-21 20:39:19,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:19,717 INFO L225 Difference]: With dead ends: 158841 [2021-05-21 20:39:19,718 INFO L226 Difference]: Without dead ends: 158080 [2021-05-21 20:39:19,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 277.7ms TimeCoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:39:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158080 states. [2021-05-21 20:39:22,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158080 to 127564. [2021-05-21 20:39:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127564 states, 127563 states have (on average 3.7467839420521623) internal successors, (477951), 127563 states have internal predecessors, (477951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127564 states to 127564 states and 477951 transitions. [2021-05-21 20:39:23,709 INFO L78 Accepts]: Start accepts. Automaton has 127564 states and 477951 transitions. Word has length 29 [2021-05-21 20:39:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:23,709 INFO L482 AbstractCegarLoop]: Abstraction has 127564 states and 477951 transitions. [2021-05-21 20:39:23,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-05-21 20:39:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 127564 states and 477951 transitions. [2021-05-21 20:39:23,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:39:23,911 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:23,911 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:24,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-21 20:39:24,113 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:24,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:24,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2080726810, now seen corresponding path program 118 times [2021-05-21 20:39:24,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:24,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791587398] [2021-05-21 20:39:24,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:39:24,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791587398] [2021-05-21 20:39:24,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791587398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305742003] [2021-05-21 20:39:24,132 INFO L93 rtionOrderModulation]: Changing 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 [2021-05-21 20:39:24,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:39:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:24,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:39:24,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:39:24,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305742003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:24,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:24,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-21 20:39:24,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031444841] [2021-05-21 20:39:24,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:39:24,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:39:24,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:39:24,190 INFO L87 Difference]: Start difference. First operand 127564 states and 477951 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-05-21 20:39:24,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:24,878 INFO L93 Difference]: Finished difference Result 144032 states and 532857 transitions. [2021-05-21 20:39:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:39:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 29 [2021-05-21 20:39:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:26,025 INFO L225 Difference]: With dead ends: 144032 [2021-05-21 20:39:26,026 INFO L226 Difference]: Without dead ends: 144002 [2021-05-21 20:39:26,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:39:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144002 states. [2021-05-21 20:39:28,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144002 to 129426. [2021-05-21 20:39:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129426 states, 129425 states have (on average 3.7404597257098704) internal successors, (484109), 129425 states have internal predecessors, (484109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129426 states to 129426 states and 484109 transitions. [2021-05-21 20:39:29,202 INFO L78 Accepts]: Start accepts. Automaton has 129426 states and 484109 transitions. Word has length 29 [2021-05-21 20:39:29,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:29,202 INFO L482 AbstractCegarLoop]: Abstraction has 129426 states and 484109 transitions. [2021-05-21 20:39:29,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-05-21 20:39:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 129426 states and 484109 transitions. [2021-05-21 20:39:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:39:29,385 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:29,385 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:29,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:29,589 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:29,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:29,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1305487906, now seen corresponding path program 119 times [2021-05-21 20:39:29,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:29,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121678924] [2021-05-21 20:39:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:29,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:29,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121678924] [2021-05-21 20:39:29,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121678924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:29,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156167509] [2021-05-21 20:39:29,618 INFO L93 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 [2021-05-21 20:39:29,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:39:29,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:29,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:39:29,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:39:29,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156167509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:29,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:29,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-21 20:39:29,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442522788] [2021-05-21 20:39:29,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:29,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:29,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:29,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:29,676 INFO L87 Difference]: Start difference. First operand 129426 states and 484109 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-05-21 20:39:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:31,002 INFO L93 Difference]: Finished difference Result 143204 states and 525770 transitions. [2021-05-21 20:39:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:39:31,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 29 [2021-05-21 20:39:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:31,432 INFO L225 Difference]: With dead ends: 143204 [2021-05-21 20:39:31,432 INFO L226 Difference]: Without dead ends: 143141 [2021-05-21 20:39:31,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:39:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143141 states. [2021-05-21 20:39:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143141 to 126464. [2021-05-21 20:39:34,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126464 states, 126463 states have (on average 3.727643658619517) internal successors, (471409), 126463 states have internal predecessors, (471409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126464 states to 126464 states and 471409 transitions. [2021-05-21 20:39:34,422 INFO L78 Accepts]: Start accepts. Automaton has 126464 states and 471409 transitions. Word has length 29 [2021-05-21 20:39:34,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:34,422 INFO L482 AbstractCegarLoop]: Abstraction has 126464 states and 471409 transitions. [2021-05-21 20:39:34,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-05-21 20:39:34,422 INFO L276 IsEmpty]: Start isEmpty. Operand 126464 states and 471409 transitions. [2021-05-21 20:39:34,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:39:34,607 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:34,607 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:34,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-21 20:39:34,809 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:34,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:34,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2110231202, now seen corresponding path program 120 times [2021-05-21 20:39:34,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:34,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560698097] [2021-05-21 20:39:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:39:34,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:34,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560698097] [2021-05-21 20:39:34,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560698097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:34,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28302461] [2021-05-21 20:39:34,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:34,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:39:34,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:34,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:39:34,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:39:34,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28302461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:34,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:34,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:39:34,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38816132] [2021-05-21 20:39:34,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:39:34,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:34,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:39:34,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:39:34,920 INFO L87 Difference]: Start difference. First operand 126464 states and 471409 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-05-21 20:39:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:37,412 INFO L93 Difference]: Finished difference Result 186865 states and 670831 transitions. [2021-05-21 20:39:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 20:39:37,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 29 [2021-05-21 20:39:37,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:38,176 INFO L225 Difference]: With dead ends: 186865 [2021-05-21 20:39:38,176 INFO L226 Difference]: Without dead ends: 186574 [2021-05-21 20:39:38,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 475.6ms TimeCoverageRelationStatistics Valid=946, Invalid=3086, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 20:39:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186574 states. [2021-05-21 20:39:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186574 to 129576. [2021-05-21 20:39:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129576 states, 129575 states have (on average 3.7100983986108433) internal successors, (480736), 129575 states have internal predecessors, (480736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129576 states to 129576 states and 480736 transitions. [2021-05-21 20:39:41,626 INFO L78 Accepts]: Start accepts. Automaton has 129576 states and 480736 transitions. Word has length 29 [2021-05-21 20:39:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:41,626 INFO L482 AbstractCegarLoop]: Abstraction has 129576 states and 480736 transitions. [2021-05-21 20:39:41,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-05-21 20:39:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 129576 states and 480736 transitions. [2021-05-21 20:39:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 20:39:42,439 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:42,439 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:42,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:42,661 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 733832030, now seen corresponding path program 121 times [2021-05-21 20:39:42,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:42,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250634120] [2021-05-21 20:39:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:39:42,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:42,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250634120] [2021-05-21 20:39:42,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250634120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:42,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299078096] [2021-05-21 20:39:42,684 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 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 [2021-05-21 20:39:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:39:42,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:39:42,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299078096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:42,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:42,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 20:39:42,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080869321] [2021-05-21 20:39:42,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:39:42,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:42,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:39:42,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:39:42,740 INFO L87 Difference]: Start difference. First operand 129576 states and 480736 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-05-21 20:39:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:43,437 INFO L93 Difference]: Finished difference Result 140798 states and 513511 transitions. [2021-05-21 20:39:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:39:43,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 29 [2021-05-21 20:39:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:43,827 INFO L225 Difference]: With dead ends: 140798 [2021-05-21 20:39:43,828 INFO L226 Difference]: Without dead ends: 140342 [2021-05-21 20:39:43,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:39:43,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140342 states. [2021-05-21 20:39:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140342 to 130720. [2021-05-21 20:39:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130720 states, 130719 states have (on average 3.7030959539164163) internal successors, (484065), 130719 states have internal predecessors, (484065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130720 states to 130720 states and 484065 transitions. [2021-05-21 20:39:47,872 INFO L78 Accepts]: Start accepts. Automaton has 130720 states and 484065 transitions. Word has length 29 [2021-05-21 20:39:47,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:47,872 INFO L482 AbstractCegarLoop]: Abstraction has 130720 states and 484065 transitions. [2021-05-21 20:39:47,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-05-21 20:39:47,872 INFO L276 IsEmpty]: Start isEmpty. Operand 130720 states and 484065 transitions. [2021-05-21 20:39:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:39:48,121 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:48,122 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:48,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-21 20:39:48,322 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:48,322 INFO L82 PathProgramCache]: Analyzing trace with hash 565779372, now seen corresponding path program 122 times [2021-05-21 20:39:48,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:48,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804687412] [2021-05-21 20:39:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:48,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:48,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804687412] [2021-05-21 20:39:48,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804687412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:48,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826682109] [2021-05-21 20:39:48,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:39:48,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:39:48,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:48,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:39:48,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:48,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826682109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:48,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:48,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:39:48,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635593054] [2021-05-21 20:39:48,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:39:48,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:48,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:39:48,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:39:48,708 INFO L87 Difference]: Start difference. First operand 130720 states and 484065 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:50,377 INFO L93 Difference]: Finished difference Result 130957 states and 484770 transitions. [2021-05-21 20:39:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:39:50,378 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:39:50,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:50,779 INFO L225 Difference]: With dead ends: 130957 [2021-05-21 20:39:50,780 INFO L226 Difference]: Without dead ends: 130942 [2021-05-21 20:39:50,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:39:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130942 states. [2021-05-21 20:39:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130942 to 130808. [2021-05-21 20:39:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130808 states, 130807 states have (on average 3.702852293837486) internal successors, (484359), 130807 states have internal predecessors, (484359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:53,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130808 states to 130808 states and 484359 transitions. [2021-05-21 20:39:53,767 INFO L78 Accepts]: Start accepts. Automaton has 130808 states and 484359 transitions. Word has length 33 [2021-05-21 20:39:53,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:53,767 INFO L482 AbstractCegarLoop]: Abstraction has 130808 states and 484359 transitions. [2021-05-21 20:39:53,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:53,767 INFO L276 IsEmpty]: Start isEmpty. Operand 130808 states and 484359 transitions. [2021-05-21 20:39:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:39:53,992 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:53,992 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:54,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:54,192 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:54,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1661708648, now seen corresponding path program 123 times [2021-05-21 20:39:54,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:54,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130496982] [2021-05-21 20:39:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:39:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:54,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:39:54,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130496982] [2021-05-21 20:39:54,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130496982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:54,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577693257] [2021-05-21 20:39:54,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:39:54,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:39:54,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:39:54,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:39:54,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:39:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:39:54,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577693257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:39:54,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:39:54,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:39:54,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119034507] [2021-05-21 20:39:54,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:39:54,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:39:54,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:39:54,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:39:54,537 INFO L87 Difference]: Start difference. First operand 130808 states and 484359 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:56,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:39:56,080 INFO L93 Difference]: Finished difference Result 131223 states and 485558 transitions. [2021-05-21 20:39:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:39:56,080 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:39:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:39:56,488 INFO L225 Difference]: With dead ends: 131223 [2021-05-21 20:39:56,488 INFO L226 Difference]: Without dead ends: 131110 [2021-05-21 20:39:56,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:39:56,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131110 states. [2021-05-21 20:39:58,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131110 to 130915. [2021-05-21 20:39:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130915 states, 130914 states have (on average 3.7024840735139097) internal successors, (484707), 130914 states have internal predecessors, (484707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:59,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130915 states to 130915 states and 484707 transitions. [2021-05-21 20:39:59,479 INFO L78 Accepts]: Start accepts. Automaton has 130915 states and 484707 transitions. Word has length 33 [2021-05-21 20:39:59,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:39:59,479 INFO L482 AbstractCegarLoop]: Abstraction has 130915 states and 484707 transitions. [2021-05-21 20:39:59,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:39:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 130915 states and 484707 transitions. [2021-05-21 20:39:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:39:59,715 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:39:59,715 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:39:59,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-05-21 20:39:59,917 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:39:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:39:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash 262334044, now seen corresponding path program 124 times [2021-05-21 20:39:59,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:39:59,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269999567] [2021-05-21 20:39:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:39:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:00,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:00,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269999567] [2021-05-21 20:40:00,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269999567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:00,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556865395] [2021-05-21 20:40:00,041 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 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 [2021-05-21 20:40:00,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:40:00,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:00,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:40:00,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:00,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556865395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:00,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:00,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:40:00,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847107513] [2021-05-21 20:40:00,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:40:00,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:00,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:40:00,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:40:00,973 INFO L87 Difference]: Start difference. First operand 130915 states and 484707 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:02,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:02,178 INFO L93 Difference]: Finished difference Result 131397 states and 486090 transitions. [2021-05-21 20:40:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:40:02,178 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:40:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:02,564 INFO L225 Difference]: With dead ends: 131397 [2021-05-21 20:40:02,564 INFO L226 Difference]: Without dead ends: 131308 [2021-05-21 20:40:02,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:40:02,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-05-21 20:40:05,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131025. [2021-05-21 20:40:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131025 states, 131024 states have (on average 3.7022224935889607) internal successors, (485080), 131024 states have internal predecessors, (485080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131025 states to 131025 states and 485080 transitions. [2021-05-21 20:40:05,983 INFO L78 Accepts]: Start accepts. Automaton has 131025 states and 485080 transitions. Word has length 33 [2021-05-21 20:40:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:05,984 INFO L482 AbstractCegarLoop]: Abstraction has 131025 states and 485080 transitions. [2021-05-21 20:40:05,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 131025 states and 485080 transitions. [2021-05-21 20:40:06,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:40:06,914 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:06,914 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:07,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:07,115 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:07,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1720019168, now seen corresponding path program 125 times [2021-05-21 20:40:07,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:07,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447823625] [2021-05-21 20:40:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:07,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:07,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447823625] [2021-05-21 20:40:07,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447823625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:07,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857804969] [2021-05-21 20:40:07,262 INFO L93 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 [2021-05-21 20:40:07,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:40:07,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:07,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:40:07,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:07,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857804969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:07,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:07,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:40:07,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333299887] [2021-05-21 20:40:07,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:40:07,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:07,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:40:07,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:40:07,570 INFO L87 Difference]: Start difference. First operand 131025 states and 485080 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:08,681 INFO L93 Difference]: Finished difference Result 131417 states and 486203 transitions. [2021-05-21 20:40:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:40:08,681 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:40:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:09,070 INFO L225 Difference]: With dead ends: 131417 [2021-05-21 20:40:09,071 INFO L226 Difference]: Without dead ends: 131387 [2021-05-21 20:40:09,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 424.9ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:40:09,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131387 states. [2021-05-21 20:40:11,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131387 to 131100. [2021-05-21 20:40:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131100 states, 131099 states have (on average 3.70232419774369) internal successors, (485371), 131099 states have internal predecessors, (485371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131100 states to 131100 states and 485371 transitions. [2021-05-21 20:40:12,804 INFO L78 Accepts]: Start accepts. Automaton has 131100 states and 485371 transitions. Word has length 33 [2021-05-21 20:40:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:12,805 INFO L482 AbstractCegarLoop]: Abstraction has 131100 states and 485371 transitions. [2021-05-21 20:40:12,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 131100 states and 485371 transitions. [2021-05-21 20:40:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:40:13,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:13,169 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:13,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-21 20:40:13,370 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:13,370 INFO L82 PathProgramCache]: Analyzing trace with hash -168976428, now seen corresponding path program 126 times [2021-05-21 20:40:13,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:13,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846136314] [2021-05-21 20:40:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:13,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:13,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846136314] [2021-05-21 20:40:13,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846136314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:13,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755756453] [2021-05-21 20:40:13,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:13,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:40:13,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:13,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:40:13,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:13,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755756453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:13,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:13,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:40:13,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799401577] [2021-05-21 20:40:13,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:40:13,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:13,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:40:13,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:40:13,775 INFO L87 Difference]: Start difference. First operand 131100 states and 485371 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:14,799 INFO L93 Difference]: Finished difference Result 131430 states and 486305 transitions. [2021-05-21 20:40:14,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:40:14,799 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:40:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:15,853 INFO L225 Difference]: With dead ends: 131430 [2021-05-21 20:40:15,853 INFO L226 Difference]: Without dead ends: 131346 [2021-05-21 20:40:15,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:40:15,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131346 states. [2021-05-21 20:40:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131346 to 131132. [2021-05-21 20:40:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131132 states, 131131 states have (on average 3.7021528090230382) internal successors, (485467), 131131 states have internal predecessors, (485467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131132 states to 131132 states and 485467 transitions. [2021-05-21 20:40:19,270 INFO L78 Accepts]: Start accepts. Automaton has 131132 states and 485467 transitions. Word has length 33 [2021-05-21 20:40:19,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:19,270 INFO L482 AbstractCegarLoop]: Abstraction has 131132 states and 485467 transitions. [2021-05-21 20:40:19,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:19,271 INFO L276 IsEmpty]: Start isEmpty. Operand 131132 states and 485467 transitions. [2021-05-21 20:40:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:40:19,531 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:19,531 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:19,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-21 20:40:19,731 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:19,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1755066264, now seen corresponding path program 127 times [2021-05-21 20:40:19,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:19,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818663689] [2021-05-21 20:40:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:19,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:19,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818663689] [2021-05-21 20:40:19,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818663689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:19,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131974876] [2021-05-21 20:40:19,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:40:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:19,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:40:19,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:20,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131974876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:20,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:20,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:40:20,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254974533] [2021-05-21 20:40:20,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:40:20,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:20,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:40:20,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:40:20,165 INFO L87 Difference]: Start difference. First operand 131132 states and 485467 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:21,662 INFO L93 Difference]: Finished difference Result 131646 states and 486891 transitions. [2021-05-21 20:40:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:40:21,662 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:40:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:22,091 INFO L225 Difference]: With dead ends: 131646 [2021-05-21 20:40:22,091 INFO L226 Difference]: Without dead ends: 131557 [2021-05-21 20:40:22,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 353.8ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:40:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131557 states. [2021-05-21 20:40:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131557 to 131193. [2021-05-21 20:40:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131193 states, 131192 states have (on average 3.7020778706018658) internal successors, (485683), 131192 states have internal predecessors, (485683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131193 states to 131193 states and 485683 transitions. [2021-05-21 20:40:25,132 INFO L78 Accepts]: Start accepts. Automaton has 131193 states and 485683 transitions. Word has length 33 [2021-05-21 20:40:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:25,132 INFO L482 AbstractCegarLoop]: Abstraction has 131193 states and 485683 transitions. [2021-05-21 20:40:25,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 131193 states and 485683 transitions. [2021-05-21 20:40:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:40:25,379 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:25,379 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:25,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-21 20:40:25,579 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:25,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:25,580 INFO L82 PathProgramCache]: Analyzing trace with hash -227286948, now seen corresponding path program 128 times [2021-05-21 20:40:25,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:25,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384415378] [2021-05-21 20:40:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:25,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:25,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384415378] [2021-05-21 20:40:25,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384415378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:25,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278708120] [2021-05-21 20:40:25,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:25,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:40:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:25,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:40:25,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:25,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278708120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:25,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:25,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:40:25,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481301453] [2021-05-21 20:40:25,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:40:25,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:25,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:40:25,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:40:25,912 INFO L87 Difference]: Start difference. First operand 131193 states and 485683 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:27,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:27,421 INFO L93 Difference]: Finished difference Result 131828 states and 487461 transitions. [2021-05-21 20:40:27,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:40:27,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:40:27,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:27,831 INFO L225 Difference]: With dead ends: 131828 [2021-05-21 20:40:27,832 INFO L226 Difference]: Without dead ends: 131717 [2021-05-21 20:40:27,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 297.9ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:40:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131717 states. [2021-05-21 20:40:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131717 to 131381. [2021-05-21 20:40:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131381 states, 131380 states have (on average 3.7014537981427917) internal successors, (486297), 131380 states have internal predecessors, (486297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131381 states to 131381 states and 486297 transitions. [2021-05-21 20:40:30,887 INFO L78 Accepts]: Start accepts. Automaton has 131381 states and 486297 transitions. Word has length 33 [2021-05-21 20:40:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:30,887 INFO L482 AbstractCegarLoop]: Abstraction has 131381 states and 486297 transitions. [2021-05-21 20:40:30,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 131381 states and 486297 transitions. [2021-05-21 20:40:31,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:40:31,133 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:31,133 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:31,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:31,337 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash -410972520, now seen corresponding path program 129 times [2021-05-21 20:40:31,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:31,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379557013] [2021-05-21 20:40:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:31,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:31,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379557013] [2021-05-21 20:40:31,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379557013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:31,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355471698] [2021-05-21 20:40:31,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:31,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:40:31,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:40:31,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:32,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355471698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:32,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:32,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:40:32,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070163717] [2021-05-21 20:40:32,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:40:32,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:32,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:40:32,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:40:32,340 INFO L87 Difference]: Start difference. First operand 131381 states and 486297 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:33,831 INFO L93 Difference]: Finished difference Result 131995 states and 488033 transitions. [2021-05-21 20:40:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:40:33,832 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:40:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:34,328 INFO L225 Difference]: With dead ends: 131995 [2021-05-21 20:40:34,329 INFO L226 Difference]: Without dead ends: 131906 [2021-05-21 20:40:34,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:40:34,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131906 states. [2021-05-21 20:40:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131906 to 131576. [2021-05-21 20:40:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131576 states, 131575 states have (on average 3.7008626258787762) internal successors, (486941), 131575 states have internal predecessors, (486941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131576 states to 131576 states and 486941 transitions. [2021-05-21 20:40:37,770 INFO L78 Accepts]: Start accepts. Automaton has 131576 states and 486941 transitions. Word has length 33 [2021-05-21 20:40:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:37,770 INFO L482 AbstractCegarLoop]: Abstraction has 131576 states and 486941 transitions. [2021-05-21 20:40:37,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 131576 states and 486941 transitions. [2021-05-21 20:40:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:40:38,030 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:38,030 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:38,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:38,231 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:38,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1901641564, now seen corresponding path program 130 times [2021-05-21 20:40:38,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:38,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563790283] [2021-05-21 20:40:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:38,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:38,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563790283] [2021-05-21 20:40:38,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563790283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:38,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234827957] [2021-05-21 20:40:38,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:40:38,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:40:38,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:38,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:40:38,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:38,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234827957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:38,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:38,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:40:38,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463215638] [2021-05-21 20:40:38,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:40:38,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:38,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:40:38,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:40:38,567 INFO L87 Difference]: Start difference. First operand 131576 states and 486941 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:40,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:40,109 INFO L93 Difference]: Finished difference Result 132177 states and 488586 transitions. [2021-05-21 20:40:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:40:40,110 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:40:40,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:40,473 INFO L225 Difference]: With dead ends: 132177 [2021-05-21 20:40:40,473 INFO L226 Difference]: Without dead ends: 132066 [2021-05-21 20:40:40,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:40:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132066 states. [2021-05-21 20:40:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132066 to 131642. [2021-05-21 20:40:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131642 states, 131641 states have (on average 3.700853077688562) internal successors, (487184), 131641 states have internal predecessors, (487184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131642 states to 131642 states and 487184 transitions. [2021-05-21 20:40:43,459 INFO L78 Accepts]: Start accepts. Automaton has 131642 states and 487184 transitions. Word has length 33 [2021-05-21 20:40:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:43,459 INFO L482 AbstractCegarLoop]: Abstraction has 131642 states and 487184 transitions. [2021-05-21 20:40:43,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 131642 states and 487184 transitions. [2021-05-21 20:40:43,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:40:43,720 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:43,721 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:43,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-21 20:40:43,937 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:43,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:43,937 INFO L82 PathProgramCache]: Analyzing trace with hash -773235108, now seen corresponding path program 131 times [2021-05-21 20:40:43,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:43,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465715613] [2021-05-21 20:40:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:44,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:44,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465715613] [2021-05-21 20:40:44,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465715613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:44,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398910892] [2021-05-21 20:40:44,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:44,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:40:44,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:44,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:40:44,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:44,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398910892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:44,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:44,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:40:44,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443910697] [2021-05-21 20:40:44,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:40:44,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:44,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:40:44,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:40:44,998 INFO L87 Difference]: Start difference. First operand 131642 states and 487184 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:45,964 INFO L93 Difference]: Finished difference Result 132137 states and 488592 transitions. [2021-05-21 20:40:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:40:45,965 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:40:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:46,346 INFO L225 Difference]: With dead ends: 132137 [2021-05-21 20:40:46,346 INFO L226 Difference]: Without dead ends: 132107 [2021-05-21 20:40:46,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 939.9ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:40:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132107 states. [2021-05-21 20:40:48,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132107 to 131739. [2021-05-21 20:40:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131739 states, 131738 states have (on average 3.7007697095750656) internal successors, (487532), 131738 states have internal predecessors, (487532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131739 states to 131739 states and 487532 transitions. [2021-05-21 20:40:49,434 INFO L78 Accepts]: Start accepts. Automaton has 131739 states and 487532 transitions. Word has length 33 [2021-05-21 20:40:49,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:49,434 INFO L482 AbstractCegarLoop]: Abstraction has 131739 states and 487532 transitions. [2021-05-21 20:40:49,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:49,435 INFO L276 IsEmpty]: Start isEmpty. Operand 131739 states and 487532 transitions. [2021-05-21 20:40:50,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:40:50,322 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:50,322 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:50,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-21 20:40:50,522 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:50,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:50,522 INFO L82 PathProgramCache]: Analyzing trace with hash -172389872, now seen corresponding path program 132 times [2021-05-21 20:40:50,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:50,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791491861] [2021-05-21 20:40:50,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:50,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:50,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791491861] [2021-05-21 20:40:50,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791491861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:50,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136726509] [2021-05-21 20:40:50,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:50,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:40:50,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:40:50,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:40:50,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:50,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136726509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:50,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:50,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:40:50,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128842577] [2021-05-21 20:40:50,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:40:50,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:50,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:40:50,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:40:50,864 INFO L87 Difference]: Start difference. First operand 131739 states and 487532 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:51,747 INFO L93 Difference]: Finished difference Result 132172 states and 488791 transitions. [2021-05-21 20:40:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:40:51,747 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:40:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:52,745 INFO L225 Difference]: With dead ends: 132172 [2021-05-21 20:40:52,745 INFO L226 Difference]: Without dead ends: 132142 [2021-05-21 20:40:52,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 292.8ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:40:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132142 states. [2021-05-21 20:40:54,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132142 to 131868. [2021-05-21 20:40:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131868 states, 131867 states have (on average 3.7004481788468686) internal successors, (487967), 131867 states have internal predecessors, (487967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131868 states to 131868 states and 487967 transitions. [2021-05-21 20:40:55,727 INFO L78 Accepts]: Start accepts. Automaton has 131868 states and 487967 transitions. Word has length 33 [2021-05-21 20:40:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:40:55,728 INFO L482 AbstractCegarLoop]: Abstraction has 131868 states and 487967 transitions. [2021-05-21 20:40:55,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 131868 states and 487967 transitions. [2021-05-21 20:40:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:40:56,004 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:40:56,005 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:40:56,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:40:56,205 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:40:56,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:40:56,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1751652820, now seen corresponding path program 133 times [2021-05-21 20:40:56,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:40:56,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194656156] [2021-05-21 20:40:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:40:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:56,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:40:56,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194656156] [2021-05-21 20:40:56,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194656156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:56,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047696142] [2021-05-21 20:40:56,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:40:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:40:56,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:40:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:40:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:40:56,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047696142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:40:56,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:40:56,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:40:56,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167040117] [2021-05-21 20:40:56,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:40:56,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:40:56,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:40:56,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:40:56,535 INFO L87 Difference]: Start difference. First operand 131868 states and 487967 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:40:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:40:58,185 INFO L93 Difference]: Finished difference Result 132329 states and 489260 transitions. [2021-05-21 20:40:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:40:58,185 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:40:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:40:58,617 INFO L225 Difference]: With dead ends: 132329 [2021-05-21 20:40:58,617 INFO L226 Difference]: Without dead ends: 132261 [2021-05-21 20:40:58,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:40:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132261 states. [2021-05-21 20:41:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132261 to 131985. [2021-05-21 20:41:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131985 states, 131984 states have (on average 3.7004258091889928) internal successors, (488397), 131984 states have internal predecessors, (488397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131985 states to 131985 states and 488397 transitions. [2021-05-21 20:41:01,568 INFO L78 Accepts]: Start accepts. Automaton has 131985 states and 488397 transitions. Word has length 33 [2021-05-21 20:41:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:01,568 INFO L482 AbstractCegarLoop]: Abstraction has 131985 states and 488397 transitions. [2021-05-21 20:41:01,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 131985 states and 488397 transitions. [2021-05-21 20:41:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:01,805 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:01,805 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:02,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:02,006 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:02,006 INFO L82 PathProgramCache]: Analyzing trace with hash -230700392, now seen corresponding path program 134 times [2021-05-21 20:41:02,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:02,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405992657] [2021-05-21 20:41:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:02,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:02,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405992657] [2021-05-21 20:41:02,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405992657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:02,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377486903] [2021-05-21 20:41:02,119 INFO L93 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 [2021-05-21 20:41:02,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:41:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:02,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:41:02,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:02,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377486903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:02,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:02,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:41:02,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638940184] [2021-05-21 20:41:02,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:41:02,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:02,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:41:02,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:41:02,351 INFO L87 Difference]: Start difference. First operand 131985 states and 488397 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:03,855 INFO L93 Difference]: Finished difference Result 132441 states and 489638 transitions. [2021-05-21 20:41:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:41:03,855 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:03,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:04,253 INFO L225 Difference]: With dead ends: 132441 [2021-05-21 20:41:04,253 INFO L226 Difference]: Without dead ends: 132361 [2021-05-21 20:41:04,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 290.1ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:41:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132361 states. [2021-05-21 20:41:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132361 to 131999. [2021-05-21 20:41:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131999 states, 131998 states have (on average 3.700328792860498) internal successors, (488436), 131998 states have internal predecessors, (488436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131999 states to 131999 states and 488436 transitions. [2021-05-21 20:41:07,180 INFO L78 Accepts]: Start accepts. Automaton has 131999 states and 488436 transitions. Word has length 33 [2021-05-21 20:41:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:07,180 INFO L482 AbstractCegarLoop]: Abstraction has 131999 states and 488436 transitions. [2021-05-21 20:41:07,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 131999 states and 488436 transitions. [2021-05-21 20:41:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:07,425 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:07,425 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:07,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:07,626 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash -414385964, now seen corresponding path program 135 times [2021-05-21 20:41:07,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:07,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258246577] [2021-05-21 20:41:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:07,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:07,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258246577] [2021-05-21 20:41:07,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258246577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:07,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114091603] [2021-05-21 20:41:07,711 INFO L93 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 [2021-05-21 20:41:07,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:41:07,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:07,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:41:07,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:08,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114091603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:08,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:08,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:41:08,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961898422] [2021-05-21 20:41:08,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:41:08,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:08,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:41:08,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:41:08,542 INFO L87 Difference]: Start difference. First operand 131999 states and 488436 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:09,453 INFO L93 Difference]: Finished difference Result 132789 states and 490695 transitions. [2021-05-21 20:41:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:41:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:09,814 INFO L225 Difference]: With dead ends: 132789 [2021-05-21 20:41:09,815 INFO L226 Difference]: Without dead ends: 132700 [2021-05-21 20:41:09,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:41:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132700 states. [2021-05-21 20:41:12,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132700 to 132304. [2021-05-21 20:41:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132304 states, 132303 states have (on average 3.699349221106097) internal successors, (489435), 132303 states have internal predecessors, (489435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132304 states to 132304 states and 489435 transitions. [2021-05-21 20:41:12,778 INFO L78 Accepts]: Start accepts. Automaton has 132304 states and 489435 transitions. Word has length 33 [2021-05-21 20:41:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:12,778 INFO L482 AbstractCegarLoop]: Abstraction has 132304 states and 489435 transitions. [2021-05-21 20:41:12,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 132304 states and 489435 transitions. [2021-05-21 20:41:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:13,707 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:13,707 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:13,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-05-21 20:41:13,908 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1898228120, now seen corresponding path program 136 times [2021-05-21 20:41:13,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:13,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798177177] [2021-05-21 20:41:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:13,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:13,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798177177] [2021-05-21 20:41:13,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798177177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:13,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391086190] [2021-05-21 20:41:13,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:41:14,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:41:14,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:14,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:41:14,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:14,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391086190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:14,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:14,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:41:14,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359651783] [2021-05-21 20:41:14,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:41:14,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:14,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:41:14,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:41:14,205 INFO L87 Difference]: Start difference. First operand 132304 states and 489435 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:15,191 INFO L93 Difference]: Finished difference Result 132973 states and 491280 transitions. [2021-05-21 20:41:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:41:15,192 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:15,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:15,559 INFO L225 Difference]: With dead ends: 132973 [2021-05-21 20:41:15,559 INFO L226 Difference]: Without dead ends: 132862 [2021-05-21 20:41:15,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:41:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132862 states. [2021-05-21 20:41:18,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132862 to 132462. [2021-05-21 20:41:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132462 states, 132461 states have (on average 3.698794362114132) internal successors, (489946), 132461 states have internal predecessors, (489946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132462 states to 132462 states and 489946 transitions. [2021-05-21 20:41:19,393 INFO L78 Accepts]: Start accepts. Automaton has 132462 states and 489946 transitions. Word has length 33 [2021-05-21 20:41:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:19,393 INFO L482 AbstractCegarLoop]: Abstraction has 132462 states and 489946 transitions. [2021-05-21 20:41:19,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:19,393 INFO L276 IsEmpty]: Start isEmpty. Operand 132462 states and 489946 transitions. [2021-05-21 20:41:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:19,661 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:19,661 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:19,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-21 20:41:19,862 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:19,862 INFO L82 PathProgramCache]: Analyzing trace with hash -776648552, now seen corresponding path program 137 times [2021-05-21 20:41:19,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:19,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962602608] [2021-05-21 20:41:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:19,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:19,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962602608] [2021-05-21 20:41:19,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962602608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:19,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510966975] [2021-05-21 20:41:19,946 INFO L93 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 [2021-05-21 20:41:19,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:41:19,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:19,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:41:19,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:20,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510966975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:20,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:20,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:41:20,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088363616] [2021-05-21 20:41:20,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:41:20,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:20,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:41:20,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:41:20,186 INFO L87 Difference]: Start difference. First operand 132462 states and 489946 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:21,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:21,778 INFO L93 Difference]: Finished difference Result 133313 states and 492428 transitions. [2021-05-21 20:41:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:41:21,778 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:22,181 INFO L225 Difference]: With dead ends: 133313 [2021-05-21 20:41:22,181 INFO L226 Difference]: Without dead ends: 133267 [2021-05-21 20:41:22,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:41:22,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133267 states. [2021-05-21 20:41:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133267 to 132771. [2021-05-21 20:41:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132771 states, 132770 states have (on average 3.697635007908413) internal successors, (490935), 132770 states have internal predecessors, (490935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132771 states to 132771 states and 490935 transitions. [2021-05-21 20:41:25,275 INFO L78 Accepts]: Start accepts. Automaton has 132771 states and 490935 transitions. Word has length 33 [2021-05-21 20:41:25,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:25,275 INFO L482 AbstractCegarLoop]: Abstraction has 132771 states and 490935 transitions. [2021-05-21 20:41:25,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:25,275 INFO L276 IsEmpty]: Start isEmpty. Operand 132771 states and 490935 transitions. [2021-05-21 20:41:25,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:25,524 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:25,524 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:25,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-21 20:41:25,725 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:25,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1081481172, now seen corresponding path program 138 times [2021-05-21 20:41:25,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:25,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924609337] [2021-05-21 20:41:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:25,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:25,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924609337] [2021-05-21 20:41:25,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924609337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:25,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771804173] [2021-05-21 20:41:25,815 INFO L93 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 [2021-05-21 20:41:25,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:41:25,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:25,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:41:25,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:26,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771804173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:26,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:26,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:41:26,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98130072] [2021-05-21 20:41:26,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:41:26,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:26,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:41:26,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:41:26,063 INFO L87 Difference]: Start difference. First operand 132771 states and 490935 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:27,990 INFO L93 Difference]: Finished difference Result 133655 states and 493544 transitions. [2021-05-21 20:41:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:41:27,991 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:28,518 INFO L225 Difference]: With dead ends: 133655 [2021-05-21 20:41:28,518 INFO L226 Difference]: Without dead ends: 133607 [2021-05-21 20:41:28,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:41:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133607 states. [2021-05-21 20:41:31,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133607 to 133055. [2021-05-21 20:41:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133055 states, 133054 states have (on average 3.697047815172787) internal successors, (491907), 133054 states have internal predecessors, (491907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133055 states to 133055 states and 491907 transitions. [2021-05-21 20:41:31,679 INFO L78 Accepts]: Start accepts. Automaton has 133055 states and 491907 transitions. Word has length 33 [2021-05-21 20:41:31,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:31,680 INFO L482 AbstractCegarLoop]: Abstraction has 133055 states and 491907 transitions. [2021-05-21 20:41:31,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 133055 states and 491907 transitions. [2021-05-21 20:41:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:31,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:31,916 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:32,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-21 20:41:32,116 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:32,117 INFO L82 PathProgramCache]: Analyzing trace with hash -900872040, now seen corresponding path program 139 times [2021-05-21 20:41:32,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:32,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621480252] [2021-05-21 20:41:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:32,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:32,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621480252] [2021-05-21 20:41:32,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621480252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:32,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132863327] [2021-05-21 20:41:32,209 INFO 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 [2021-05-21 20:41:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:41:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:32,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132863327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:32,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:32,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:41:32,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67909486] [2021-05-21 20:41:32,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:41:32,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:32,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:41:32,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:41:32,446 INFO L87 Difference]: Start difference. First operand 133055 states and 491907 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:33,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:33,936 INFO L93 Difference]: Finished difference Result 134042 states and 494886 transitions. [2021-05-21 20:41:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:41:33,936 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:33,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:34,309 INFO L225 Difference]: With dead ends: 134042 [2021-05-21 20:41:34,309 INFO L226 Difference]: Without dead ends: 133996 [2021-05-21 20:41:34,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:41:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133996 states. [2021-05-21 20:41:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133996 to 133457. [2021-05-21 20:41:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133457 states, 133456 states have (on average 3.696132058506174) internal successors, (493271), 133456 states have internal predecessors, (493271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133457 states to 133457 states and 493271 transitions. [2021-05-21 20:41:37,398 INFO L78 Accepts]: Start accepts. Automaton has 133457 states and 493271 transitions. Word has length 33 [2021-05-21 20:41:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:37,398 INFO L482 AbstractCegarLoop]: Abstraction has 133457 states and 493271 transitions. [2021-05-21 20:41:37,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand 133457 states and 493271 transitions. [2021-05-21 20:41:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:38,243 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:38,243 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:38,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-21 20:41:38,444 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:38,444 INFO L82 PathProgramCache]: Analyzing trace with hash 719218584, now seen corresponding path program 140 times [2021-05-21 20:41:38,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:38,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778781175] [2021-05-21 20:41:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:38,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:38,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778781175] [2021-05-21 20:41:38,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778781175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:38,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250072893] [2021-05-21 20:41:38,548 INFO L93 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 [2021-05-21 20:41:38,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:41:38,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:41:38,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:38,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250072893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:38,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:38,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:41:38,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796287021] [2021-05-21 20:41:38,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:41:38,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:38,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:41:38,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:41:38,792 INFO L87 Difference]: Start difference. First operand 133457 states and 493271 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:39,747 INFO L93 Difference]: Finished difference Result 134285 states and 495729 transitions. [2021-05-21 20:41:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:41:39,747 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:40,115 INFO L225 Difference]: With dead ends: 134285 [2021-05-21 20:41:40,115 INFO L226 Difference]: Without dead ends: 134239 [2021-05-21 20:41:40,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:41:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134239 states. [2021-05-21 20:41:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134239 to 133729. [2021-05-21 20:41:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133729 states, 133728 states have (on average 3.6952844580043074) internal successors, (494163), 133728 states have internal predecessors, (494163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133729 states to 133729 states and 494163 transitions. [2021-05-21 20:41:43,724 INFO L78 Accepts]: Start accepts. Automaton has 133729 states and 494163 transitions. Word has length 33 [2021-05-21 20:41:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:43,724 INFO L482 AbstractCegarLoop]: Abstraction has 133729 states and 494163 transitions. [2021-05-21 20:41:43,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 133729 states and 494163 transitions. [2021-05-21 20:41:44,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:44,071 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:44,071 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:44,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-21 20:41:44,271 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:44,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:44,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1446820200, now seen corresponding path program 141 times [2021-05-21 20:41:44,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:44,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865472110] [2021-05-21 20:41:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:44,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:44,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865472110] [2021-05-21 20:41:44,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865472110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:44,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108899450] [2021-05-21 20:41:44,358 INFO L93 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 [2021-05-21 20:41:44,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:41:44,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:44,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:41:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:44,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108899450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:44,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:44,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:41:44,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913528342] [2021-05-21 20:41:44,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:41:44,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:41:44,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:41:44,589 INFO L87 Difference]: Start difference. First operand 133729 states and 494163 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:45,542 INFO L93 Difference]: Finished difference Result 134286 states and 495782 transitions. [2021-05-21 20:41:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:41:45,543 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:46,625 INFO L225 Difference]: With dead ends: 134286 [2021-05-21 20:41:46,625 INFO L226 Difference]: Without dead ends: 134256 [2021-05-21 20:41:46,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 295.6ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:41:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134256 states. [2021-05-21 20:41:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134256 to 133862. [2021-05-21 20:41:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133862 states, 133861 states have (on average 3.6949522265633754) internal successors, (494610), 133861 states have internal predecessors, (494610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133862 states to 133862 states and 494610 transitions. [2021-05-21 20:41:49,828 INFO L78 Accepts]: Start accepts. Automaton has 133862 states and 494610 transitions. Word has length 33 [2021-05-21 20:41:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:49,828 INFO L482 AbstractCegarLoop]: Abstraction has 133862 states and 494610 transitions. [2021-05-21 20:41:49,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 133862 states and 494610 transitions. [2021-05-21 20:41:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:50,067 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:50,067 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:50,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:41:50,269 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:50,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:50,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1180848474, now seen corresponding path program 142 times [2021-05-21 20:41:50,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:50,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174954218] [2021-05-21 20:41:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:50,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:50,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174954218] [2021-05-21 20:41:50,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174954218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:50,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330175323] [2021-05-21 20:41:50,359 INFO L93 rtionOrderModulation]: Changing 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 [2021-05-21 20:41:50,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:41:50,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:50,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:41:50,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:50,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330175323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:50,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:50,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:41:50,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400957079] [2021-05-21 20:41:50,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:41:50,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:50,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:41:50,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:41:50,619 INFO L87 Difference]: Start difference. First operand 133862 states and 494610 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:52,313 INFO L93 Difference]: Finished difference Result 134087 states and 495235 transitions. [2021-05-21 20:41:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:41:52,314 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:52,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:52,726 INFO L225 Difference]: With dead ends: 134087 [2021-05-21 20:41:52,726 INFO L226 Difference]: Without dead ends: 134059 [2021-05-21 20:41:52,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:41:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134059 states. [2021-05-21 20:41:55,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134059 to 133901. [2021-05-21 20:41:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133901 states, 133900 states have (on average 3.6948319641523524) internal successors, (494738), 133900 states have internal predecessors, (494738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133901 states to 133901 states and 494738 transitions. [2021-05-21 20:41:55,718 INFO L78 Accepts]: Start accepts. Automaton has 133901 states and 494738 transitions. Word has length 33 [2021-05-21 20:41:55,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:41:55,718 INFO L482 AbstractCegarLoop]: Abstraction has 133901 states and 494738 transitions. [2021-05-21 20:41:55,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:55,718 INFO L276 IsEmpty]: Start isEmpty. Operand 133901 states and 494738 transitions. [2021-05-21 20:41:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:41:55,963 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:41:55,963 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:41:56,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-05-21 20:41:56,163 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:41:56,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:41:56,163 INFO L82 PathProgramCache]: Analyzing trace with hash 886630802, now seen corresponding path program 143 times [2021-05-21 20:41:56,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:41:56,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856435579] [2021-05-21 20:41:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:41:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:41:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:56,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:41:56,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856435579] [2021-05-21 20:41:56,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856435579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:56,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414821430] [2021-05-21 20:41:56,250 INFO L93 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 [2021-05-21 20:41:56,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:41:56,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:41:56,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:41:56,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:41:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:41:57,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414821430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:41:57,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:41:57,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:41:57,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86069168] [2021-05-21 20:41:57,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:41:57,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:41:57,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:41:57,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:41:57,056 INFO L87 Difference]: Start difference. First operand 133901 states and 494738 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:41:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:41:58,189 INFO L93 Difference]: Finished difference Result 134211 states and 495550 transitions. [2021-05-21 20:41:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:41:58,189 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:41:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:41:58,562 INFO L225 Difference]: With dead ends: 134211 [2021-05-21 20:41:58,562 INFO L226 Difference]: Without dead ends: 134069 [2021-05-21 20:41:58,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 366.8ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:41:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134069 states. [2021-05-21 20:42:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134069 to 133952. [2021-05-21 20:42:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133952 states, 133951 states have (on average 3.694612208942076) internal successors, (494897), 133951 states have internal predecessors, (494897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133952 states to 133952 states and 494897 transitions. [2021-05-21 20:42:01,567 INFO L78 Accepts]: Start accepts. Automaton has 133952 states and 494897 transitions. Word has length 33 [2021-05-21 20:42:01,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:01,567 INFO L482 AbstractCegarLoop]: Abstraction has 133952 states and 494897 transitions. [2021-05-21 20:42:01,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:01,567 INFO L276 IsEmpty]: Start isEmpty. Operand 133952 states and 494897 transitions. [2021-05-21 20:42:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:42:02,397 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:02,397 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:02,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:02,613 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:02,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1484293802, now seen corresponding path program 144 times [2021-05-21 20:42:02,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:02,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763361335] [2021-05-21 20:42:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:02,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:02,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763361335] [2021-05-21 20:42:02,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763361335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:02,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092115918] [2021-05-21 20:42:02,731 INFO L93 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 [2021-05-21 20:42:02,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:42:02,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:02,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:42:02,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:02,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092115918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:02,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:02,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:42:02,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898088575] [2021-05-21 20:42:02,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:42:02,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:02,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:42:02,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:42:02,971 INFO L87 Difference]: Start difference. First operand 133952 states and 494897 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:03,943 INFO L93 Difference]: Finished difference Result 134387 states and 496089 transitions. [2021-05-21 20:42:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:42:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:42:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:04,319 INFO L225 Difference]: With dead ends: 134387 [2021-05-21 20:42:04,320 INFO L226 Difference]: Without dead ends: 134277 [2021-05-21 20:42:04,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 334.5ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:42:05,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134277 states. [2021-05-21 20:42:06,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134277 to 134057. [2021-05-21 20:42:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134057 states, 134056 states have (on average 3.694254639852002) internal successors, (495237), 134056 states have internal predecessors, (495237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134057 states to 134057 states and 495237 transitions. [2021-05-21 20:42:08,149 INFO L78 Accepts]: Start accepts. Automaton has 134057 states and 495237 transitions. Word has length 33 [2021-05-21 20:42:08,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:08,149 INFO L482 AbstractCegarLoop]: Abstraction has 134057 states and 495237 transitions. [2021-05-21 20:42:08,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:08,150 INFO L276 IsEmpty]: Start isEmpty. Operand 134057 states and 495237 transitions. [2021-05-21 20:42:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:42:08,424 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:08,424 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:08,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:08,625 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:08,625 INFO L82 PathProgramCache]: Analyzing trace with hash 828320282, now seen corresponding path program 145 times [2021-05-21 20:42:08,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:08,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762510490] [2021-05-21 20:42:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:08,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:08,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762510490] [2021-05-21 20:42:08,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762510490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:08,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923213151] [2021-05-21 20:42:08,718 INFO 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 [2021-05-21 20:42:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:08,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:42:08,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:08,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923213151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:08,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:08,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:42:08,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412373890] [2021-05-21 20:42:08,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:42:08,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:08,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:42:08,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:42:08,943 INFO L87 Difference]: Start difference. First operand 134057 states and 495237 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:10,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:10,640 INFO L93 Difference]: Finished difference Result 134490 states and 496428 transitions. [2021-05-21 20:42:10,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:42:10,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:42:10,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:11,054 INFO L225 Difference]: With dead ends: 134490 [2021-05-21 20:42:11,054 INFO L226 Difference]: Without dead ends: 134406 [2021-05-21 20:42:11,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:42:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134406 states. [2021-05-21 20:42:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134406 to 134109. [2021-05-21 20:42:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134109 states, 134108 states have (on average 3.694343365049065) internal successors, (495441), 134108 states have internal predecessors, (495441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134109 states to 134109 states and 495441 transitions. [2021-05-21 20:42:14,201 INFO L78 Accepts]: Start accepts. Automaton has 134109 states and 495441 transitions. Word has length 33 [2021-05-21 20:42:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:14,201 INFO L482 AbstractCegarLoop]: Abstraction has 134109 states and 495441 transitions. [2021-05-21 20:42:14,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:14,201 INFO L276 IsEmpty]: Start isEmpty. Operand 134109 states and 495441 transitions. [2021-05-21 20:42:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:42:14,439 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:14,439 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:14,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:14,640 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:14,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1915604274, now seen corresponding path program 146 times [2021-05-21 20:42:14,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:14,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627165938] [2021-05-21 20:42:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:14,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:14,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627165938] [2021-05-21 20:42:14,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627165938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:14,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371351096] [2021-05-21 20:42:14,725 INFO L93 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 [2021-05-21 20:42:14,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:42:14,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:14,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:42:14,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:14,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371351096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:14,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:14,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:42:14,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060552841] [2021-05-21 20:42:14,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:42:14,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:14,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:42:14,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:42:14,979 INFO L87 Difference]: Start difference. First operand 134109 states and 495441 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:16,504 INFO L93 Difference]: Finished difference Result 134427 states and 496277 transitions. [2021-05-21 20:42:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:42:16,505 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:42:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:16,892 INFO L225 Difference]: With dead ends: 134427 [2021-05-21 20:42:16,893 INFO L226 Difference]: Without dead ends: 134285 [2021-05-21 20:42:16,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:42:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134285 states. [2021-05-21 20:42:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134285 to 134133. [2021-05-21 20:42:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134133 states, 134132 states have (on average 3.694248948796708) internal successors, (495517), 134132 states have internal predecessors, (495517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:20,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134133 states to 134133 states and 495517 transitions. [2021-05-21 20:42:20,483 INFO L78 Accepts]: Start accepts. Automaton has 134133 states and 495517 transitions. Word has length 33 [2021-05-21 20:42:20,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:20,483 INFO L482 AbstractCegarLoop]: Abstraction has 134133 states and 495517 transitions. [2021-05-21 20:42:20,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:20,484 INFO L276 IsEmpty]: Start isEmpty. Operand 134133 states and 495517 transitions. [2021-05-21 20:42:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:42:20,798 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:20,798 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:21,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:21,013 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:21,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:21,014 INFO L82 PathProgramCache]: Analyzing trace with hash 8438418, now seen corresponding path program 147 times [2021-05-21 20:42:21,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:21,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003571842] [2021-05-21 20:42:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:21,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:21,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003571842] [2021-05-21 20:42:21,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003571842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:21,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105480649] [2021-05-21 20:42:21,117 INFO L93 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 [2021-05-21 20:42:21,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:42:21,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:21,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:42:21,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:21,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105480649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:21,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:21,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:42:21,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344207453] [2021-05-21 20:42:21,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:42:21,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:21,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:42:21,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:42:21,390 INFO L87 Difference]: Start difference. First operand 134133 states and 495517 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:22,930 INFO L93 Difference]: Finished difference Result 134488 states and 496453 transitions. [2021-05-21 20:42:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:42:22,931 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:42:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:23,305 INFO L225 Difference]: With dead ends: 134488 [2021-05-21 20:42:23,305 INFO L226 Difference]: Without dead ends: 134378 [2021-05-21 20:42:23,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:42:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134378 states. [2021-05-21 20:42:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134378 to 134238. [2021-05-21 20:42:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134238 states, 134237 states have (on average 3.6939815401118916) internal successors, (495869), 134237 states have internal predecessors, (495869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134238 states to 134238 states and 495869 transitions. [2021-05-21 20:42:26,447 INFO L78 Accepts]: Start accepts. Automaton has 134238 states and 495869 transitions. Word has length 33 [2021-05-21 20:42:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:26,447 INFO L482 AbstractCegarLoop]: Abstraction has 134238 states and 495869 transitions. [2021-05-21 20:42:26,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 134238 states and 495869 transitions. [2021-05-21 20:42:26,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:42:26,703 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:26,703 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:26,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-05-21 20:42:26,903 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:26,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:26,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1973914794, now seen corresponding path program 148 times [2021-05-21 20:42:26,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:26,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285273378] [2021-05-21 20:42:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:27,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:27,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285273378] [2021-05-21 20:42:27,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285273378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:27,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908382521] [2021-05-21 20:42:27,633 INFO L93 rtionOrderModulation]: Changing 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 [2021-05-21 20:42:27,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:42:27,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:42:27,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:27,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908382521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:27,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:27,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:42:27,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660199281] [2021-05-21 20:42:27,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:42:27,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:27,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:42:27,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:42:27,968 INFO L87 Difference]: Start difference. First operand 134238 states and 495869 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:28,841 INFO L93 Difference]: Finished difference Result 134606 states and 496835 transitions. [2021-05-21 20:42:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:42:28,841 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:42:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:29,202 INFO L225 Difference]: With dead ends: 134606 [2021-05-21 20:42:29,202 INFO L226 Difference]: Without dead ends: 134470 [2021-05-21 20:42:29,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:42:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134470 states. [2021-05-21 20:42:31,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134470 to 134329. [2021-05-21 20:42:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134329 states, 134328 states have (on average 3.6937347388481925) internal successors, (496172), 134328 states have internal predecessors, (496172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134329 states to 134329 states and 496172 transitions. [2021-05-21 20:42:32,194 INFO L78 Accepts]: Start accepts. Automaton has 134329 states and 496172 transitions. Word has length 33 [2021-05-21 20:42:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:32,194 INFO L482 AbstractCegarLoop]: Abstraction has 134329 states and 496172 transitions. [2021-05-21 20:42:32,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand 134329 states and 496172 transitions. [2021-05-21 20:42:33,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:42:33,177 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:33,177 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:33,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-21 20:42:33,378 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:33,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2137366930, now seen corresponding path program 149 times [2021-05-21 20:42:33,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:33,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003724042] [2021-05-21 20:42:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:33,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:33,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003724042] [2021-05-21 20:42:33,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003724042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:33,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687300002] [2021-05-21 20:42:33,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:42:33,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:42:33,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:33,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:42:33,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:33,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687300002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:33,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:33,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:42:33,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831208514] [2021-05-21 20:42:33,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:42:33,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:33,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:42:33,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:42:33,743 INFO L87 Difference]: Start difference. First operand 134329 states and 496172 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:35,374 INFO L93 Difference]: Finished difference Result 134895 states and 497770 transitions. [2021-05-21 20:42:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:42:35,374 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:42:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:35,764 INFO L225 Difference]: With dead ends: 134895 [2021-05-21 20:42:35,765 INFO L226 Difference]: Without dead ends: 134785 [2021-05-21 20:42:35,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:42:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134785 states. [2021-05-21 20:42:37,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134785 to 134598. [2021-05-21 20:42:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134598 states, 134597 states have (on average 3.692853481132566) internal successors, (497047), 134597 states have internal predecessors, (497047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134598 states to 134598 states and 497047 transitions. [2021-05-21 20:42:39,075 INFO L78 Accepts]: Start accepts. Automaton has 134598 states and 497047 transitions. Word has length 33 [2021-05-21 20:42:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:39,075 INFO L482 AbstractCegarLoop]: Abstraction has 134598 states and 497047 transitions. [2021-05-21 20:42:39,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:39,075 INFO L276 IsEmpty]: Start isEmpty. Operand 134598 states and 497047 transitions. [2021-05-21 20:42:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:42:39,314 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:39,314 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:39,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-21 20:42:39,515 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:39,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:39,515 INFO L82 PathProgramCache]: Analyzing trace with hash 155013718, now seen corresponding path program 150 times [2021-05-21 20:42:39,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:39,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408399586] [2021-05-21 20:42:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:39,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:39,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408399586] [2021-05-21 20:42:39,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408399586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:39,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451702180] [2021-05-21 20:42:39,599 INFO L93 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 [2021-05-21 20:42:39,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:42:39,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:39,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:42:39,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:39,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451702180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:39,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:39,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:42:39,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68821658] [2021-05-21 20:42:39,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:42:39,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:39,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:42:39,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:42:39,845 INFO L87 Difference]: Start difference. First operand 134598 states and 497047 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:41,323 INFO L93 Difference]: Finished difference Result 135111 states and 498442 transitions. [2021-05-21 20:42:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:42:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:42:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:41,754 INFO L225 Difference]: With dead ends: 135111 [2021-05-21 20:42:41,754 INFO L226 Difference]: Without dead ends: 134975 [2021-05-21 20:42:41,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:42:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134975 states. [2021-05-21 20:42:44,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134975 to 134792. [2021-05-21 20:42:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134792 states, 134791 states have (on average 3.6920269157436327) internal successors, (497652), 134791 states have internal predecessors, (497652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134792 states to 134792 states and 497652 transitions. [2021-05-21 20:42:44,805 INFO L78 Accepts]: Start accepts. Automaton has 134792 states and 497652 transitions. Word has length 33 [2021-05-21 20:42:44,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:44,805 INFO L482 AbstractCegarLoop]: Abstraction has 134792 states and 497652 transitions. [2021-05-21 20:42:44,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 134792 states and 497652 transitions. [2021-05-21 20:42:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:42:45,063 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:45,063 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:45,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-21 20:42:45,264 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:45,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:45,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1775104342, now seen corresponding path program 151 times [2021-05-21 20:42:45,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:45,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394422923] [2021-05-21 20:42:45,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:45,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:45,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394422923] [2021-05-21 20:42:45,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394422923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:45,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491303826] [2021-05-21 20:42:45,349 INFO 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 [2021-05-21 20:42:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:45,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:42:45,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:46,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491303826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:46,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:46,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:42:46,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184493010] [2021-05-21 20:42:46,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:42:46,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:46,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:42:46,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:42:46,364 INFO L87 Difference]: Start difference. First operand 134792 states and 497652 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:47,410 INFO L93 Difference]: Finished difference Result 135221 states and 498845 transitions. [2021-05-21 20:42:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:42:47,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:42:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:47,784 INFO L225 Difference]: With dead ends: 135221 [2021-05-21 20:42:47,784 INFO L226 Difference]: Without dead ends: 135130 [2021-05-21 20:42:47,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:42:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135130 states. [2021-05-21 20:42:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135130 to 134844. [2021-05-21 20:42:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134844 states, 134843 states have (on average 3.6920270240205277) internal successors, (497844), 134843 states have internal predecessors, (497844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134844 states to 134844 states and 497844 transitions. [2021-05-21 20:42:50,833 INFO L78 Accepts]: Start accepts. Automaton has 134844 states and 497844 transitions. Word has length 33 [2021-05-21 20:42:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:50,833 INFO L482 AbstractCegarLoop]: Abstraction has 134844 states and 497844 transitions. [2021-05-21 20:42:50,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 134844 states and 497844 transitions. [2021-05-21 20:42:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:42:51,840 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:51,840 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:52,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:42:52,045 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:52,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1268459362, now seen corresponding path program 152 times [2021-05-21 20:42:52,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:52,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319155896] [2021-05-21 20:42:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:52,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:52,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319155896] [2021-05-21 20:42:52,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319155896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:52,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792631386] [2021-05-21 20:42:52,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:42:52,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:42:52,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:42:52,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:52,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792631386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:52,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:52,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:42:52,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590066167] [2021-05-21 20:42:52,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:42:52,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:52,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:42:52,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:42:52,423 INFO L87 Difference]: Start difference. First operand 134844 states and 497844 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:42:53,411 INFO L93 Difference]: Finished difference Result 135053 states and 498421 transitions. [2021-05-21 20:42:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:42:53,412 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:42:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:42:54,471 INFO L225 Difference]: With dead ends: 135053 [2021-05-21 20:42:54,471 INFO L226 Difference]: Without dead ends: 135025 [2021-05-21 20:42:54,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 392.4ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:42:54,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135025 states. [2021-05-21 20:42:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135025 to 134864. [2021-05-21 20:42:56,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134864 states, 134863 states have (on average 3.6919243973513862) internal successors, (497904), 134863 states have internal predecessors, (497904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134864 states to 134864 states and 497904 transitions. [2021-05-21 20:42:57,596 INFO L78 Accepts]: Start accepts. Automaton has 134864 states and 497904 transitions. Word has length 33 [2021-05-21 20:42:57,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:42:57,597 INFO L482 AbstractCegarLoop]: Abstraction has 134864 states and 497904 transitions. [2021-05-21 20:42:57,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:42:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 134864 states and 497904 transitions. [2021-05-21 20:42:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:42:57,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:42:57,881 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:42:58,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-05-21 20:42:58,081 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:42:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:42:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash -959028658, now seen corresponding path program 153 times [2021-05-21 20:42:58,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:42:58,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172001795] [2021-05-21 20:42:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:42:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:42:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:58,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:42:58,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172001795] [2021-05-21 20:42:58,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172001795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:58,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472671770] [2021-05-21 20:42:58,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:42:58,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:42:58,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:42:58,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:42:58,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:42:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:42:58,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472671770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:42:58,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:42:58,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:42:58,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826098450] [2021-05-21 20:42:58,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:42:58,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:42:58,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:42:58,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:42:58,396 INFO L87 Difference]: Start difference. First operand 134864 states and 497904 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:00,022 INFO L93 Difference]: Finished difference Result 135170 states and 498704 transitions. [2021-05-21 20:43:00,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:43:00,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:43:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:00,428 INFO L225 Difference]: With dead ends: 135170 [2021-05-21 20:43:00,429 INFO L226 Difference]: Without dead ends: 135028 [2021-05-21 20:43:00,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:43:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135028 states. [2021-05-21 20:43:02,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135028 to 134868. [2021-05-21 20:43:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134868 states, 134867 states have (on average 3.691903875670105) internal successors, (497916), 134867 states have internal predecessors, (497916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134868 states to 134868 states and 497916 transitions. [2021-05-21 20:43:03,507 INFO L78 Accepts]: Start accepts. Automaton has 134868 states and 497916 transitions. Word has length 33 [2021-05-21 20:43:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:03,507 INFO L482 AbstractCegarLoop]: Abstraction has 134868 states and 497916 transitions. [2021-05-21 20:43:03,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 134868 states and 497916 transitions. [2021-05-21 20:43:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:43:03,754 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:03,754 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:03,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:03,955 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:03,955 INFO L82 PathProgramCache]: Analyzing trace with hash 965014034, now seen corresponding path program 154 times [2021-05-21 20:43:03,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:03,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622836328] [2021-05-21 20:43:03,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:04,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:04,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622836328] [2021-05-21 20:43:04,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622836328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:04,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122939940] [2021-05-21 20:43:04,041 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 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 [2021-05-21 20:43:04,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:04,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:43:04,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:04,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122939940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:04,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:04,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:43:04,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977149604] [2021-05-21 20:43:04,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:43:04,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:04,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:43:04,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:43:04,284 INFO L87 Difference]: Start difference. First operand 134868 states and 497916 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:05,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:05,839 INFO L93 Difference]: Finished difference Result 135436 states and 499523 transitions. [2021-05-21 20:43:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:43:05,840 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:43:05,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:06,228 INFO L225 Difference]: With dead ends: 135436 [2021-05-21 20:43:06,228 INFO L226 Difference]: Without dead ends: 135326 [2021-05-21 20:43:06,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:43:06,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135326 states. [2021-05-21 20:43:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135326 to 135008. [2021-05-21 20:43:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135008 states, 135007 states have (on average 3.6911123126948975) internal successors, (498326), 135007 states have internal predecessors, (498326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:09,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135008 states to 135008 states and 498326 transitions. [2021-05-21 20:43:09,718 INFO L78 Accepts]: Start accepts. Automaton has 135008 states and 498326 transitions. Word has length 33 [2021-05-21 20:43:09,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:09,718 INFO L482 AbstractCegarLoop]: Abstraction has 135008 states and 498326 transitions. [2021-05-21 20:43:09,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:09,718 INFO L276 IsEmpty]: Start isEmpty. Operand 135008 states and 498326 transitions. [2021-05-21 20:43:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:43:10,710 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:10,710 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:10,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:10,932 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:10,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1017339178, now seen corresponding path program 155 times [2021-05-21 20:43:10,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:10,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854098723] [2021-05-21 20:43:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:11,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:11,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854098723] [2021-05-21 20:43:11,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854098723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:11,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374735884] [2021-05-21 20:43:11,019 INFO L93 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 [2021-05-21 20:43:11,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:43:11,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:11,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:43:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:11,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374735884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:11,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:11,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:43:11,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566819450] [2021-05-21 20:43:11,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:43:11,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:11,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:43:11,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:43:11,263 INFO L87 Difference]: Start difference. First operand 135008 states and 498326 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:12,208 INFO L93 Difference]: Finished difference Result 135409 states and 499417 transitions. [2021-05-21 20:43:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:43:12,209 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:43:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:12,574 INFO L225 Difference]: With dead ends: 135409 [2021-05-21 20:43:12,574 INFO L226 Difference]: Without dead ends: 135325 [2021-05-21 20:43:12,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:43:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135325 states. [2021-05-21 20:43:15,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135325 to 134976. [2021-05-21 20:43:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134976 states, 134975 states have (on average 3.6913057973698833) internal successors, (498234), 134975 states have internal predecessors, (498234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134976 states to 134976 states and 498234 transitions. [2021-05-21 20:43:16,332 INFO L78 Accepts]: Start accepts. Automaton has 134976 states and 498234 transitions. Word has length 33 [2021-05-21 20:43:16,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:16,332 INFO L482 AbstractCegarLoop]: Abstraction has 134976 states and 498234 transitions. [2021-05-21 20:43:16,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 134976 states and 498234 transitions. [2021-05-21 20:43:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:43:16,636 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:16,636 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:16,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:16,837 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:16,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1160274146, now seen corresponding path program 156 times [2021-05-21 20:43:16,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:16,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322554618] [2021-05-21 20:43:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:16,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:16,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322554618] [2021-05-21 20:43:16,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322554618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:16,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275866053] [2021-05-21 20:43:16,927 INFO L93 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 [2021-05-21 20:43:16,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:43:16,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:16,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:43:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:17,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275866053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:17,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:17,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:43:17,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937823295] [2021-05-21 20:43:17,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:43:17,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:17,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:43:17,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:43:17,216 INFO L87 Difference]: Start difference. First operand 134976 states and 498234 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:18,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:18,890 INFO L93 Difference]: Finished difference Result 135181 states and 498843 transitions. [2021-05-21 20:43:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:43:18,890 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:43:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:19,294 INFO L225 Difference]: With dead ends: 135181 [2021-05-21 20:43:19,294 INFO L226 Difference]: Without dead ends: 135166 [2021-05-21 20:43:19,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:43:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135166 states. [2021-05-21 20:43:21,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135166 to 135012. [2021-05-21 20:43:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135012 states, 135011 states have (on average 3.6913362614898046) internal successors, (498371), 135011 states have internal predecessors, (498371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:22,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135012 states to 135012 states and 498371 transitions. [2021-05-21 20:43:22,295 INFO L78 Accepts]: Start accepts. Automaton has 135012 states and 498371 transitions. Word has length 33 [2021-05-21 20:43:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:22,295 INFO L482 AbstractCegarLoop]: Abstraction has 135012 states and 498371 transitions. [2021-05-21 20:43:22,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 135012 states and 498371 transitions. [2021-05-21 20:43:22,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:43:22,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:22,542 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:22,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-05-21 20:43:22,742 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:22,743 INFO L82 PathProgramCache]: Analyzing trace with hash 516165646, now seen corresponding path program 157 times [2021-05-21 20:43:22,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:22,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633680508] [2021-05-21 20:43:22,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:22,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:22,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633680508] [2021-05-21 20:43:22,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633680508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:22,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794659534] [2021-05-21 20:43:22,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:43:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:22,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:43:22,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:23,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794659534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:23,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:23,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:43:23,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936134674] [2021-05-21 20:43:23,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:43:23,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:23,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:43:23,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:43:23,063 INFO L87 Difference]: Start difference. First operand 135012 states and 498371 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:24,596 INFO L93 Difference]: Finished difference Result 135441 states and 499607 transitions. [2021-05-21 20:43:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:43:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:43:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:25,002 INFO L225 Difference]: With dead ends: 135441 [2021-05-21 20:43:25,003 INFO L226 Difference]: Without dead ends: 135329 [2021-05-21 20:43:25,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:43:25,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135329 states. [2021-05-21 20:43:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135329 to 135120. [2021-05-21 20:43:27,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135120 states, 135119 states have (on average 3.6909094945936545) internal successors, (498712), 135119 states have internal predecessors, (498712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135120 states to 135120 states and 498712 transitions. [2021-05-21 20:43:28,111 INFO L78 Accepts]: Start accepts. Automaton has 135120 states and 498712 transitions. Word has length 33 [2021-05-21 20:43:28,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:28,111 INFO L482 AbstractCegarLoop]: Abstraction has 135120 states and 498712 transitions. [2021-05-21 20:43:28,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:28,111 INFO L276 IsEmpty]: Start isEmpty. Operand 135120 states and 498712 transitions. [2021-05-21 20:43:28,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:43:28,357 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:28,357 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:28,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:28,557 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:28,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:28,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1371713326, now seen corresponding path program 158 times [2021-05-21 20:43:28,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:28,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18074922] [2021-05-21 20:43:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:29,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:29,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18074922] [2021-05-21 20:43:29,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18074922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:29,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464115457] [2021-05-21 20:43:29,281 INFO L93 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 [2021-05-21 20:43:29,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:43:29,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:29,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:43:29,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:29,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464115457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:29,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:29,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:43:29,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035450470] [2021-05-21 20:43:29,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:43:29,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:29,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:43:29,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:43:29,628 INFO L87 Difference]: Start difference. First operand 135120 states and 498712 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:30,635 INFO L93 Difference]: Finished difference Result 135711 states and 500369 transitions. [2021-05-21 20:43:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:43:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:43:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:30,996 INFO L225 Difference]: With dead ends: 135711 [2021-05-21 20:43:30,996 INFO L226 Difference]: Without dead ends: 135631 [2021-05-21 20:43:30,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 989.3ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:43:31,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135631 states. [2021-05-21 20:43:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135631 to 135275. [2021-05-21 20:43:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135275 states, 135274 states have (on average 3.690443100669752) internal successors, (499221), 135274 states have internal predecessors, (499221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135275 states to 135275 states and 499221 transitions. [2021-05-21 20:43:34,488 INFO L78 Accepts]: Start accepts. Automaton has 135275 states and 499221 transitions. Word has length 33 [2021-05-21 20:43:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:34,488 INFO L482 AbstractCegarLoop]: Abstraction has 135275 states and 499221 transitions. [2021-05-21 20:43:34,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 135275 states and 499221 transitions. [2021-05-21 20:43:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:43:34,839 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:34,839 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:35,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-21 20:43:35,040 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:35,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1177029994, now seen corresponding path program 159 times [2021-05-21 20:43:35,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:35,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038608222] [2021-05-21 20:43:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:35,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:35,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038608222] [2021-05-21 20:43:35,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038608222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:35,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932680939] [2021-05-21 20:43:35,129 INFO L93 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 [2021-05-21 20:43:35,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 20:43:35,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:35,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:43:35,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:35,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932680939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:35,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:35,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:43:35,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20557335] [2021-05-21 20:43:35,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:43:35,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:35,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:43:35,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:43:35,392 INFO L87 Difference]: Start difference. First operand 135275 states and 499221 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:37,099 INFO L93 Difference]: Finished difference Result 135676 states and 500356 transitions. [2021-05-21 20:43:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:43:37,099 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:43:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:37,529 INFO L225 Difference]: With dead ends: 135676 [2021-05-21 20:43:37,529 INFO L226 Difference]: Without dead ends: 135646 [2021-05-21 20:43:37,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:43:37,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135646 states. [2021-05-21 20:43:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135646 to 135346. [2021-05-21 20:43:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135346 states, 135345 states have (on average 3.690509438841479) internal successors, (499492), 135345 states have internal predecessors, (499492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135346 states to 135346 states and 499492 transitions. [2021-05-21 20:43:40,606 INFO L78 Accepts]: Start accepts. Automaton has 135346 states and 499492 transitions. Word has length 33 [2021-05-21 20:43:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:40,606 INFO L482 AbstractCegarLoop]: Abstraction has 135346 states and 499492 transitions. [2021-05-21 20:43:40,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 135346 states and 499492 transitions. [2021-05-21 20:43:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:43:40,848 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:40,849 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:41,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:43:41,053 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:41,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:41,053 INFO L82 PathProgramCache]: Analyzing trace with hash -588948574, now seen corresponding path program 160 times [2021-05-21 20:43:41,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:41,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863223329] [2021-05-21 20:43:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:41,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:41,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863223329] [2021-05-21 20:43:41,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863223329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:41,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811276330] [2021-05-21 20:43:41,138 INFO L93 rtionOrderModulation]: Changing 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 [2021-05-21 20:43:41,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:43:41,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:41,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:43:41,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:41,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811276330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:41,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:41,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:43:41,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487429491] [2021-05-21 20:43:41,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:43:41,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:41,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:43:41,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:43:41,384 INFO L87 Difference]: Start difference. First operand 135346 states and 499492 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:42,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:42,831 INFO L93 Difference]: Finished difference Result 136007 states and 501349 transitions. [2021-05-21 20:43:42,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:43:42,831 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:43:42,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:43,223 INFO L225 Difference]: With dead ends: 136007 [2021-05-21 20:43:43,223 INFO L226 Difference]: Without dead ends: 135825 [2021-05-21 20:43:43,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 324.8ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:43:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135825 states. [2021-05-21 20:43:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135825 to 135578. [2021-05-21 20:43:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135578 states, 135577 states have (on average 3.6892393252542837) internal successors, (500176), 135577 states have internal predecessors, (500176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135578 states to 135578 states and 500176 transitions. [2021-05-21 20:43:46,256 INFO L78 Accepts]: Start accepts. Automaton has 135578 states and 500176 transitions. Word has length 33 [2021-05-21 20:43:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:46,256 INFO L482 AbstractCegarLoop]: Abstraction has 135578 states and 500176 transitions. [2021-05-21 20:43:46,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 135578 states and 500176 transitions. [2021-05-21 20:43:46,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:43:46,505 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:46,505 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:46,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-21 20:43:46,706 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:46,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:46,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1267056682, now seen corresponding path program 161 times [2021-05-21 20:43:46,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:46,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989392951] [2021-05-21 20:43:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:46,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:46,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989392951] [2021-05-21 20:43:46,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989392951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:46,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542506794] [2021-05-21 20:43:46,792 INFO L93 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 [2021-05-21 20:43:46,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:43:46,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:46,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:43:46,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:47,520 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-21 20:43:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:47,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542506794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:47,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:47,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:43:47,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602991374] [2021-05-21 20:43:47,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:43:47,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:47,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:43:47,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:43:47,762 INFO L87 Difference]: Start difference. First operand 135578 states and 500176 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:48,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:48,797 INFO L93 Difference]: Finished difference Result 136135 states and 501711 transitions. [2021-05-21 20:43:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:43:48,798 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:43:48,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:49,167 INFO L225 Difference]: With dead ends: 136135 [2021-05-21 20:43:49,167 INFO L226 Difference]: Without dead ends: 136008 [2021-05-21 20:43:49,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 424.0ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:43:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136008 states. [2021-05-21 20:43:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136008 to 135568. [2021-05-21 20:43:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135568 states, 135567 states have (on average 3.6892237786481963) internal successors, (500137), 135567 states have internal predecessors, (500137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135568 states to 135568 states and 500137 transitions. [2021-05-21 20:43:52,179 INFO L78 Accepts]: Start accepts. Automaton has 135568 states and 500137 transitions. Word has length 33 [2021-05-21 20:43:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:52,179 INFO L482 AbstractCegarLoop]: Abstraction has 135568 states and 500137 transitions. [2021-05-21 20:43:52,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 135568 states and 500137 transitions. [2021-05-21 20:43:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:43:53,157 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:53,157 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:43:53,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-21 20:43:53,358 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:43:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:43:53,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1810631706, now seen corresponding path program 162 times [2021-05-21 20:43:53,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:43:53,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796940006] [2021-05-21 20:43:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:43:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:43:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:43:53,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:43:53,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796940006] [2021-05-21 20:43:53,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796940006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:53,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432084849] [2021-05-21 20:43:53,438 INFO L93 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 [2021-05-21 20:43:53,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:43:53,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:43:53,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:43:53,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:43:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:43:53,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432084849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:43:53,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:43:53,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:43:53,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883550651] [2021-05-21 20:43:53,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:43:53,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:43:53,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:43:53,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:43:53,669 INFO L87 Difference]: Start difference. First operand 135568 states and 500137 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:43:54,687 INFO L93 Difference]: Finished difference Result 135962 states and 501194 transitions. [2021-05-21 20:43:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:43:54,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:43:54,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:43:55,972 INFO L225 Difference]: With dead ends: 135962 [2021-05-21 20:43:55,972 INFO L226 Difference]: Without dead ends: 135878 [2021-05-21 20:43:55,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 309.3ms TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:43:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135878 states. [2021-05-21 20:43:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135878 to 135615. [2021-05-21 20:43:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135615 states, 135614 states have (on average 3.689235624640524) internal successors, (500312), 135614 states have internal predecessors, (500312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135615 states to 135615 states and 500312 transitions. [2021-05-21 20:43:59,615 INFO L78 Accepts]: Start accepts. Automaton has 135615 states and 500312 transitions. Word has length 33 [2021-05-21 20:43:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:43:59,615 INFO L482 AbstractCegarLoop]: Abstraction has 135615 states and 500312 transitions. [2021-05-21 20:43:59,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:43:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 135615 states and 500312 transitions. [2021-05-21 20:43:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:43:59,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:43:59,953 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:00,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:00,154 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:00,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:00,154 INFO L82 PathProgramCache]: Analyzing trace with hash 654578334, now seen corresponding path program 163 times [2021-05-21 20:44:00,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:00,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817702971] [2021-05-21 20:44:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:44:00,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:00,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817702971] [2021-05-21 20:44:00,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817702971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:00,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439558548] [2021-05-21 20:44:00,258 INFO 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 [2021-05-21 20:44:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:00,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:44:00,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:00,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439558548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:00,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:00,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:44:00,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426746048] [2021-05-21 20:44:00,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:44:00,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:00,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:44:00,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:44:00,508 INFO L87 Difference]: Start difference. First operand 135615 states and 500312 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:02,090 INFO L93 Difference]: Finished difference Result 136030 states and 501487 transitions. [2021-05-21 20:44:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:44:02,101 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:44:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:02,559 INFO L225 Difference]: With dead ends: 136030 [2021-05-21 20:44:02,559 INFO L226 Difference]: Without dead ends: 136000 [2021-05-21 20:44:02,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:44:02,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136000 states. [2021-05-21 20:44:04,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136000 to 135676. [2021-05-21 20:44:04,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135676 states, 135675 states have (on average 3.689272157729869) internal successors, (500542), 135675 states have internal predecessors, (500542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:05,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135676 states to 135676 states and 500542 transitions. [2021-05-21 20:44:05,753 INFO L78 Accepts]: Start accepts. Automaton has 135676 states and 500542 transitions. Word has length 33 [2021-05-21 20:44:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:05,753 INFO L482 AbstractCegarLoop]: Abstraction has 135676 states and 500542 transitions. [2021-05-21 20:44:05,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 135676 states and 500542 transitions. [2021-05-21 20:44:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:44:06,020 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:06,021 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:06,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:06,225 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:06,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:06,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1745873050, now seen corresponding path program 164 times [2021-05-21 20:44:06,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:06,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838538528] [2021-05-21 20:44:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:06,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:06,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838538528] [2021-05-21 20:44:06,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838538528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:06,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625744822] [2021-05-21 20:44:06,305 INFO L93 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 [2021-05-21 20:44:06,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:06,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:06,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:44:06,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:06,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625744822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:06,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:06,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:44:06,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129232123] [2021-05-21 20:44:06,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:44:06,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:06,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:44:06,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:44:06,535 INFO L87 Difference]: Start difference. First operand 135676 states and 500542 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:08,018 INFO L93 Difference]: Finished difference Result 135970 states and 501235 transitions. [2021-05-21 20:44:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:44:08,018 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:44:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:08,454 INFO L225 Difference]: With dead ends: 135970 [2021-05-21 20:44:08,454 INFO L226 Difference]: Without dead ends: 135812 [2021-05-21 20:44:08,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:44:08,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135812 states. [2021-05-21 20:44:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135812 to 135650. [2021-05-21 20:44:10,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135650 states, 135649 states have (on average 3.6883869398226303) internal successors, (500326), 135649 states have internal predecessors, (500326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135650 states to 135650 states and 500326 transitions. [2021-05-21 20:44:11,439 INFO L78 Accepts]: Start accepts. Automaton has 135650 states and 500326 transitions. Word has length 33 [2021-05-21 20:44:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:11,439 INFO L482 AbstractCegarLoop]: Abstraction has 135650 states and 500326 transitions. [2021-05-21 20:44:11,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 135650 states and 500326 transitions. [2021-05-21 20:44:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:44:11,691 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:11,691 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:11,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-05-21 20:44:11,891 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:11,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:11,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1141614370, now seen corresponding path program 165 times [2021-05-21 20:44:11,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:11,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014437255] [2021-05-21 20:44:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:11,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:11,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014437255] [2021-05-21 20:44:11,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014437255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:11,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281725272] [2021-05-21 20:44:11,973 INFO L93 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 [2021-05-21 20:44:11,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:44:11,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:11,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:44:11,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:12,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281725272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:12,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:12,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:44:12,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609909316] [2021-05-21 20:44:12,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:44:12,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:12,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:44:12,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:44:12,209 INFO L87 Difference]: Start difference. First operand 135650 states and 500326 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:13,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:13,948 INFO L93 Difference]: Finished difference Result 136261 states and 501957 transitions. [2021-05-21 20:44:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:44:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:44:13,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:14,328 INFO L225 Difference]: With dead ends: 136261 [2021-05-21 20:44:14,328 INFO L226 Difference]: Without dead ends: 136063 [2021-05-21 20:44:14,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:44:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136063 states. [2021-05-21 20:44:16,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136063 to 135852. [2021-05-21 20:44:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135852 states, 135851 states have (on average 3.6868628129347596) internal successors, (500864), 135851 states have internal predecessors, (500864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135852 states to 135852 states and 500864 transitions. [2021-05-21 20:44:17,418 INFO L78 Accepts]: Start accepts. Automaton has 135852 states and 500864 transitions. Word has length 33 [2021-05-21 20:44:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:17,419 INFO L482 AbstractCegarLoop]: Abstraction has 135852 states and 500864 transitions. [2021-05-21 20:44:17,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 135852 states and 500864 transitions. [2021-05-21 20:44:18,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:44:18,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:18,391 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:18,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:18,614 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:18,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1527145246, now seen corresponding path program 166 times [2021-05-21 20:44:18,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:18,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229270347] [2021-05-21 20:44:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:18,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:18,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229270347] [2021-05-21 20:44:18,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229270347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:18,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416302970] [2021-05-21 20:44:18,688 INFO L93 rtionOrderModulation]: Changing 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 [2021-05-21 20:44:18,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:44:18,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:18,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:44:18,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:18,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416302970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:18,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:18,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:44:18,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102769520] [2021-05-21 20:44:18,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:44:18,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:18,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:44:18,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:44:18,922 INFO L87 Difference]: Start difference. First operand 135852 states and 500864 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:19,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:19,769 INFO L93 Difference]: Finished difference Result 136405 states and 502442 transitions. [2021-05-21 20:44:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:44:19,769 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:44:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:20,138 INFO L225 Difference]: With dead ends: 136405 [2021-05-21 20:44:20,138 INFO L226 Difference]: Without dead ends: 136263 [2021-05-21 20:44:20,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:44:20,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136263 states. [2021-05-21 20:44:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136263 to 136063. [2021-05-21 20:44:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136063 states, 136062 states have (on average 3.6861283826490863) internal successors, (501542), 136062 states have internal predecessors, (501542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136063 states to 136063 states and 501542 transitions. [2021-05-21 20:44:23,841 INFO L78 Accepts]: Start accepts. Automaton has 136063 states and 501542 transitions. Word has length 33 [2021-05-21 20:44:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:23,841 INFO L482 AbstractCegarLoop]: Abstraction has 136063 states and 501542 transitions. [2021-05-21 20:44:23,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 136063 states and 501542 transitions. [2021-05-21 20:44:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:44:24,162 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:24,163 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:24,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:24,363 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash 966556586, now seen corresponding path program 167 times [2021-05-21 20:44:24,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:24,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087490941] [2021-05-21 20:44:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:24,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087490941] [2021-05-21 20:44:24,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087490941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995097851] [2021-05-21 20:44:24,434 INFO L93 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 [2021-05-21 20:44:24,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:44:24,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:24,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:44:24,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:24,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995097851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:24,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:24,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:44:24,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341835954] [2021-05-21 20:44:24,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:44:24,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:24,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:44:24,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:44:24,675 INFO L87 Difference]: Start difference. First operand 136063 states and 501542 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:26,297 INFO L93 Difference]: Finished difference Result 136463 states and 502600 transitions. [2021-05-21 20:44:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:44:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:44:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:26,710 INFO L225 Difference]: With dead ends: 136463 [2021-05-21 20:44:26,710 INFO L226 Difference]: Without dead ends: 136357 [2021-05-21 20:44:26,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:44:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136357 states. [2021-05-21 20:44:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136357 to 136175. [2021-05-21 20:44:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136175 states, 136174 states have (on average 3.6854759352005524) internal successors, (501866), 136174 states have internal predecessors, (501866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136175 states to 136175 states and 501866 transitions. [2021-05-21 20:44:29,751 INFO L78 Accepts]: Start accepts. Automaton has 136175 states and 501866 transitions. Word has length 33 [2021-05-21 20:44:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:29,751 INFO L482 AbstractCegarLoop]: Abstraction has 136175 states and 501866 transitions. [2021-05-21 20:44:29,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 136175 states and 501866 transitions. [2021-05-21 20:44:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:44:29,997 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:29,997 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:30,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:30,198 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:30,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:30,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1161239918, now seen corresponding path program 168 times [2021-05-21 20:44:30,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:30,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900674511] [2021-05-21 20:44:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:30,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:30,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900674511] [2021-05-21 20:44:30,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900674511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:30,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857280063] [2021-05-21 20:44:30,284 INFO L93 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 [2021-05-21 20:44:30,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:44:30,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:30,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:44:30,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:30,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857280063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:30,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:30,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:44:30,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144051552] [2021-05-21 20:44:30,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:44:30,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:30,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:44:30,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:44:30,514 INFO L87 Difference]: Start difference. First operand 136175 states and 501866 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:32,127 INFO L93 Difference]: Finished difference Result 136837 states and 503693 transitions. [2021-05-21 20:44:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:44:32,127 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:44:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:32,502 INFO L225 Difference]: With dead ends: 136837 [2021-05-21 20:44:32,502 INFO L226 Difference]: Without dead ends: 136710 [2021-05-21 20:44:32,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:44:32,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136710 states. [2021-05-21 20:44:34,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136710 to 136135. [2021-05-21 20:44:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136135 states, 136134 states have (on average 3.686360497744869) internal successors, (501839), 136134 states have internal predecessors, (501839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136135 states to 136135 states and 501839 transitions. [2021-05-21 20:44:35,455 INFO L78 Accepts]: Start accepts. Automaton has 136135 states and 501839 transitions. Word has length 33 [2021-05-21 20:44:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:35,455 INFO L482 AbstractCegarLoop]: Abstraction has 136135 states and 501839 transitions. [2021-05-21 20:44:35,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 136135 states and 501839 transitions. [2021-05-21 20:44:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:44:35,709 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:35,709 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:35,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-05-21 20:44:35,909 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:35,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1704814942, now seen corresponding path program 169 times [2021-05-21 20:44:35,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:35,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224466316] [2021-05-21 20:44:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:44:36,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:36,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224466316] [2021-05-21 20:44:36,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224466316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:36,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552169893] [2021-05-21 20:44:36,649 INFO 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 [2021-05-21 20:44:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:36,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:44:36,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:36,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552169893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:36,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:36,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:44:36,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025334477] [2021-05-21 20:44:36,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:44:36,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:36,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:44:36,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:44:36,968 INFO L87 Difference]: Start difference. First operand 136135 states and 501839 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:37,860 INFO L93 Difference]: Finished difference Result 136552 states and 502951 transitions. [2021-05-21 20:44:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:44:37,860 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:44:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:38,240 INFO L225 Difference]: With dead ends: 136552 [2021-05-21 20:44:38,240 INFO L226 Difference]: Without dead ends: 136408 [2021-05-21 20:44:38,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:44:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136408 states. [2021-05-21 20:44:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136408 to 136224. [2021-05-21 20:44:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136224 states, 136223 states have (on average 3.6858460025105892) internal successors, (502097), 136223 states have internal predecessors, (502097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136224 states to 136224 states and 502097 transitions. [2021-05-21 20:44:41,814 INFO L78 Accepts]: Start accepts. Automaton has 136224 states and 502097 transitions. Word has length 33 [2021-05-21 20:44:41,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:41,814 INFO L482 AbstractCegarLoop]: Abstraction has 136224 states and 502097 transitions. [2021-05-21 20:44:41,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:41,814 INFO L276 IsEmpty]: Start isEmpty. Operand 136224 states and 502097 transitions. [2021-05-21 20:44:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:44:42,173 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:42,173 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:42,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:42,373 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:42,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:42,374 INFO L82 PathProgramCache]: Analyzing trace with hash 548761570, now seen corresponding path program 170 times [2021-05-21 20:44:42,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:42,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838305270] [2021-05-21 20:44:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:44:42,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:42,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838305270] [2021-05-21 20:44:42,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838305270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:42,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142078703] [2021-05-21 20:44:42,451 INFO L93 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 [2021-05-21 20:44:42,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:42,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:42,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:44:42,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:42,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142078703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:42,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:42,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:44:42,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116170432] [2021-05-21 20:44:42,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:44:42,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:42,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:44:42,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:44:42,677 INFO L87 Difference]: Start difference. First operand 136224 states and 502097 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:44,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:44,340 INFO L93 Difference]: Finished difference Result 136817 states and 503721 transitions. [2021-05-21 20:44:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:44:44,341 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:44:44,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:45,169 INFO L225 Difference]: With dead ends: 136817 [2021-05-21 20:44:45,169 INFO L226 Difference]: Without dead ends: 136702 [2021-05-21 20:44:45,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:44:45,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136702 states. [2021-05-21 20:44:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136702 to 136321. [2021-05-21 20:44:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136321 states, 136320 states have (on average 3.68581279342723) internal successors, (502450), 136320 states have internal predecessors, (502450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136321 states to 136321 states and 502450 transitions. [2021-05-21 20:44:48,797 INFO L78 Accepts]: Start accepts. Automaton has 136321 states and 502450 transitions. Word has length 33 [2021-05-21 20:44:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:48,797 INFO L482 AbstractCegarLoop]: Abstraction has 136321 states and 502450 transitions. [2021-05-21 20:44:48,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 136321 states and 502450 transitions. [2021-05-21 20:44:49,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:44:49,081 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:49,081 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:49,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-21 20:44:49,281 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:49,282 INFO L82 PathProgramCache]: Analyzing trace with hash 308801818, now seen corresponding path program 171 times [2021-05-21 20:44:49,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:49,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852395828] [2021-05-21 20:44:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:49,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:49,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852395828] [2021-05-21 20:44:49,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852395828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:49,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496484067] [2021-05-21 20:44:49,356 INFO L93 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 [2021-05-21 20:44:49,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:44:49,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:49,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:44:49,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:49,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496484067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:49,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:49,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:44:49,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737098450] [2021-05-21 20:44:49,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:44:49,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:49,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:44:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:44:49,587 INFO L87 Difference]: Start difference. First operand 136321 states and 502450 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:51,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:51,137 INFO L93 Difference]: Finished difference Result 136671 states and 503372 transitions. [2021-05-21 20:44:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:44:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:44:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:51,538 INFO L225 Difference]: With dead ends: 136671 [2021-05-21 20:44:51,539 INFO L226 Difference]: Without dead ends: 136497 [2021-05-21 20:44:51,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:44:51,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136497 states. [2021-05-21 20:44:53,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136497 to 136433. [2021-05-21 20:44:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136433 states, 136432 states have (on average 3.6851911574997067) internal successors, (502778), 136432 states have internal predecessors, (502778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136433 states to 136433 states and 502778 transitions. [2021-05-21 20:44:54,675 INFO L78 Accepts]: Start accepts. Automaton has 136433 states and 502778 transitions. Word has length 33 [2021-05-21 20:44:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:54,675 INFO L482 AbstractCegarLoop]: Abstraction has 136433 states and 502778 transitions. [2021-05-21 20:44:54,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 136433 states and 502778 transitions. [2021-05-21 20:44:54,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:44:54,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:54,932 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:55,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-21 20:44:55,133 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:55,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1656613022, now seen corresponding path program 172 times [2021-05-21 20:44:55,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:55,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814212690] [2021-05-21 20:44:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:55,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:55,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814212690] [2021-05-21 20:44:55,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814212690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:55,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187819038] [2021-05-21 20:44:55,211 INFO L93 rtionOrderModulation]: Changing 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 [2021-05-21 20:44:55,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:44:55,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:55,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:44:55,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:55,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187819038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:55,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:55,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:44:55,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201177396] [2021-05-21 20:44:55,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:44:55,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:55,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:44:55,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:44:55,471 INFO L87 Difference]: Start difference. First operand 136433 states and 502778 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:57,007 INFO L93 Difference]: Finished difference Result 136787 states and 503684 transitions. [2021-05-21 20:44:57,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:44:57,007 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:44:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:57,396 INFO L225 Difference]: With dead ends: 136787 [2021-05-21 20:44:57,396 INFO L226 Difference]: Without dead ends: 136633 [2021-05-21 20:44:57,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:44:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136633 states. [2021-05-21 20:44:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136633 to 136417. [2021-05-21 20:44:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136417 states, 136416 states have (on average 3.6851322425521933) internal successors, (502711), 136416 states have internal predecessors, (502711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136417 states to 136417 states and 502711 transitions. [2021-05-21 20:45:00,316 INFO L78 Accepts]: Start accepts. Automaton has 136417 states and 502711 transitions. Word has length 33 [2021-05-21 20:45:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:00,316 INFO L482 AbstractCegarLoop]: Abstraction has 136417 states and 502711 transitions. [2021-05-21 20:45:00,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 136417 states and 502711 transitions. [2021-05-21 20:45:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:45:00,564 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:00,564 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:00,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:00,765 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:00,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:00,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1189214166, now seen corresponding path program 173 times [2021-05-21 20:45:00,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:00,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542841477] [2021-05-21 20:45:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:00,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:00,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542841477] [2021-05-21 20:45:00,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542841477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:00,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522799114] [2021-05-21 20:45:00,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:45:00,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 20:45:00,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:00,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:45:00,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:01,485 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-05-21 20:45:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:01,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522799114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:01,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:01,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:45:01,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928475060] [2021-05-21 20:45:01,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:45:01,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:01,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:45:01,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:45:01,770 INFO L87 Difference]: Start difference. First operand 136417 states and 502711 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:02,764 INFO L93 Difference]: Finished difference Result 137004 states and 504307 transitions. [2021-05-21 20:45:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:45:02,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:45:02,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:03,143 INFO L225 Difference]: With dead ends: 137004 [2021-05-21 20:45:03,144 INFO L226 Difference]: Without dead ends: 136877 [2021-05-21 20:45:03,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:45:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136877 states. [2021-05-21 20:45:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136877 to 136498. [2021-05-21 20:45:06,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136498 states, 136497 states have (on average 3.6851652417269243) internal successors, (503014), 136497 states have internal predecessors, (503014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136498 states to 136498 states and 503014 transitions. [2021-05-21 20:45:07,100 INFO L78 Accepts]: Start accepts. Automaton has 136498 states and 503014 transitions. Word has length 33 [2021-05-21 20:45:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:07,101 INFO L482 AbstractCegarLoop]: Abstraction has 136498 states and 503014 transitions. [2021-05-21 20:45:07,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:07,101 INFO L276 IsEmpty]: Start isEmpty. Operand 136498 states and 503014 transitions. [2021-05-21 20:45:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:45:07,525 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:07,525 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:07,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-05-21 20:45:07,747 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:07,747 INFO L82 PathProgramCache]: Analyzing trace with hash -323997470, now seen corresponding path program 174 times [2021-05-21 20:45:07,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:07,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811462760] [2021-05-21 20:45:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:45:07,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:07,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811462760] [2021-05-21 20:45:07,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811462760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:07,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113712412] [2021-05-21 20:45:07,829 INFO L93 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 [2021-05-21 20:45:07,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:45:07,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:07,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:45:07,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:08,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113712412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:08,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:08,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:45:08,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865679435] [2021-05-21 20:45:08,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:45:08,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:08,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:45:08,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:45:08,082 INFO L87 Difference]: Start difference. First operand 136498 states and 503014 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:09,103 INFO L93 Difference]: Finished difference Result 137151 states and 504800 transitions. [2021-05-21 20:45:09,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:45:09,103 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:45:09,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:10,178 INFO L225 Difference]: With dead ends: 137151 [2021-05-21 20:45:10,178 INFO L226 Difference]: Without dead ends: 137008 [2021-05-21 20:45:10,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:45:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137008 states. [2021-05-21 20:45:12,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137008 to 136605. [2021-05-21 20:45:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136605 states, 136604 states have (on average 3.685111709759597) internal successors, (503401), 136604 states have internal predecessors, (503401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136605 states to 136605 states and 503401 transitions. [2021-05-21 20:45:13,471 INFO L78 Accepts]: Start accepts. Automaton has 136605 states and 503401 transitions. Word has length 33 [2021-05-21 20:45:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:13,471 INFO L482 AbstractCegarLoop]: Abstraction has 136605 states and 503401 transitions. [2021-05-21 20:45:13,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 136605 states and 503401 transitions. [2021-05-21 20:45:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:45:13,758 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:13,759 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:13,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:13,959 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:13,960 INFO L82 PathProgramCache]: Analyzing trace with hash 740825498, now seen corresponding path program 175 times [2021-05-21 20:45:13,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:13,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631704205] [2021-05-21 20:45:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:14,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:14,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631704205] [2021-05-21 20:45:14,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631704205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:14,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857725261] [2021-05-21 20:45:14,041 INFO 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 [2021-05-21 20:45:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:14,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:45:14,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:14,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857725261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:14,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:14,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:45:14,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142164607] [2021-05-21 20:45:14,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:45:14,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:14,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:45:14,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:45:14,260 INFO L87 Difference]: Start difference. First operand 136605 states and 503401 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:15,901 INFO L93 Difference]: Finished difference Result 137345 states and 505531 transitions. [2021-05-21 20:45:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:45:15,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:45:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:16,325 INFO L225 Difference]: With dead ends: 137345 [2021-05-21 20:45:16,325 INFO L226 Difference]: Without dead ends: 137202 [2021-05-21 20:45:16,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:45:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137202 states. [2021-05-21 20:45:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137202 to 136759. [2021-05-21 20:45:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136759 states, 136758 states have (on average 3.6850348791295575) internal successors, (503958), 136758 states have internal predecessors, (503958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136759 states to 136759 states and 503958 transitions. [2021-05-21 20:45:19,596 INFO L78 Accepts]: Start accepts. Automaton has 136759 states and 503958 transitions. Word has length 33 [2021-05-21 20:45:19,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:19,596 INFO L482 AbstractCegarLoop]: Abstraction has 136759 states and 503958 transitions. [2021-05-21 20:45:19,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:19,596 INFO L276 IsEmpty]: Start isEmpty. Operand 136759 states and 503958 transitions. [2021-05-21 20:45:19,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:45:19,843 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:19,843 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:20,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-05-21 20:45:20,044 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:20,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2124902626, now seen corresponding path program 176 times [2021-05-21 20:45:20,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:20,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62342462] [2021-05-21 20:45:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:20,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:20,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62342462] [2021-05-21 20:45:20,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62342462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:20,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074979275] [2021-05-21 20:45:20,764 INFO L93 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 [2021-05-21 20:45:20,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:45:20,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:20,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:45:20,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:21,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074979275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:21,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:21,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:45:21,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532254996] [2021-05-21 20:45:21,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:45:21,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:21,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:45:21,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:45:21,112 INFO L87 Difference]: Start difference. First operand 136759 states and 503958 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:22,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:22,049 INFO L93 Difference]: Finished difference Result 137461 states and 505914 transitions. [2021-05-21 20:45:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:45:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:45:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:22,428 INFO L225 Difference]: With dead ends: 137461 [2021-05-21 20:45:22,428 INFO L226 Difference]: Without dead ends: 137356 [2021-05-21 20:45:22,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:45:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137356 states. [2021-05-21 20:45:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137356 to 136882. [2021-05-21 20:45:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136882 states, 136881 states have (on average 3.685040290471285) internal successors, (504412), 136881 states have internal predecessors, (504412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136882 states to 136882 states and 504412 transitions. [2021-05-21 20:45:26,217 INFO L78 Accepts]: Start accepts. Automaton has 136882 states and 504412 transitions. Word has length 33 [2021-05-21 20:45:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:26,217 INFO L482 AbstractCegarLoop]: Abstraction has 136882 states and 504412 transitions. [2021-05-21 20:45:26,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 136882 states and 504412 transitions. [2021-05-21 20:45:26,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:45:26,523 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:26,523 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:26,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:26,724 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:26,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:26,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1248276962, now seen corresponding path program 177 times [2021-05-21 20:45:26,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:26,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050583127] [2021-05-21 20:45:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:26,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:26,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050583127] [2021-05-21 20:45:26,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050583127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:26,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742024109] [2021-05-21 20:45:26,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:45:26,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:45:26,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:26,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:45:26,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:27,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742024109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:27,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:27,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:45:27,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816511857] [2021-05-21 20:45:27,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:45:27,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:27,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:45:27,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:45:27,053 INFO L87 Difference]: Start difference. First operand 136882 states and 504412 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:28,856 INFO L93 Difference]: Finished difference Result 138201 states and 508135 transitions. [2021-05-21 20:45:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:45:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:45:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:29,284 INFO L225 Difference]: With dead ends: 138201 [2021-05-21 20:45:29,285 INFO L226 Difference]: Without dead ends: 138065 [2021-05-21 20:45:29,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 292.6ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:45:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138065 states. [2021-05-21 20:45:31,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138065 to 136923. [2021-05-21 20:45:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136923 states, 136922 states have (on average 3.6860110135697695) internal successors, (504696), 136922 states have internal predecessors, (504696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136923 states to 136923 states and 504696 transitions. [2021-05-21 20:45:32,352 INFO L78 Accepts]: Start accepts. Automaton has 136923 states and 504696 transitions. Word has length 33 [2021-05-21 20:45:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:32,352 INFO L482 AbstractCegarLoop]: Abstraction has 136923 states and 504696 transitions. [2021-05-21 20:45:32,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 136923 states and 504696 transitions. [2021-05-21 20:45:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:45:32,606 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:32,606 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:32,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:32,807 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash -960276966, now seen corresponding path program 178 times [2021-05-21 20:45:32,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:32,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194032890] [2021-05-21 20:45:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:32,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:32,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194032890] [2021-05-21 20:45:32,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194032890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:32,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925661405] [2021-05-21 20:45:32,892 INFO L93 rtionOrderModulation]: Changing 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 [2021-05-21 20:45:32,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:45:32,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:32,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:45:32,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:33,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925661405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:33,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:33,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:45:33,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943850212] [2021-05-21 20:45:33,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:45:33,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:33,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:45:33,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:45:33,186 INFO L87 Difference]: Start difference. First operand 136923 states and 504696 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:34,746 INFO L93 Difference]: Finished difference Result 137357 states and 505946 transitions. [2021-05-21 20:45:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:45:34,747 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:45:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:35,712 INFO L225 Difference]: With dead ends: 137357 [2021-05-21 20:45:35,712 INFO L226 Difference]: Without dead ends: 137275 [2021-05-21 20:45:35,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 318.8ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:45:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137275 states. [2021-05-21 20:45:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137275 to 136972. [2021-05-21 20:45:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136972 states, 136971 states have (on average 3.6859627220360514) internal successors, (504870), 136971 states have internal predecessors, (504870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136972 states to 136972 states and 504870 transitions. [2021-05-21 20:45:39,380 INFO L78 Accepts]: Start accepts. Automaton has 136972 states and 504870 transitions. Word has length 33 [2021-05-21 20:45:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:39,380 INFO L482 AbstractCegarLoop]: Abstraction has 136972 states and 504870 transitions. [2021-05-21 20:45:39,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 136972 states and 504870 transitions. [2021-05-21 20:45:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:45:39,627 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:39,627 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:39,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:39,828 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:39,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:39,828 INFO L82 PathProgramCache]: Analyzing trace with hash 963765726, now seen corresponding path program 179 times [2021-05-21 20:45:39,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:39,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009522104] [2021-05-21 20:45:39,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:39,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:39,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009522104] [2021-05-21 20:45:39,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009522104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:39,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550688162] [2021-05-21 20:45:39,946 INFO L93 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 [2021-05-21 20:45:39,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:45:39,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:39,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:45:39,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:40,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550688162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:40,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:40,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:45:40,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40375220] [2021-05-21 20:45:40,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:45:40,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:40,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:45:40,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:45:40,237 INFO L87 Difference]: Start difference. First operand 136972 states and 504870 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:41,679 INFO L93 Difference]: Finished difference Result 137654 states and 506819 transitions. [2021-05-21 20:45:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:45:41,679 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:45:41,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:42,083 INFO L225 Difference]: With dead ends: 137654 [2021-05-21 20:45:42,083 INFO L226 Difference]: Without dead ends: 137544 [2021-05-21 20:45:42,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:45:42,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137544 states. [2021-05-21 20:45:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137544 to 137016. [2021-05-21 20:45:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137016 states, 137015 states have (on average 3.6854650950625842) internal successors, (504964), 137015 states have internal predecessors, (504964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137016 states to 137016 states and 504964 transitions. [2021-05-21 20:45:45,154 INFO L78 Accepts]: Start accepts. Automaton has 137016 states and 504964 transitions. Word has length 33 [2021-05-21 20:45:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:45,155 INFO L482 AbstractCegarLoop]: Abstraction has 137016 states and 504964 transitions. [2021-05-21 20:45:45,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 137016 states and 504964 transitions. [2021-05-21 20:45:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:45:45,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:45,408 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:45,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:45,608 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:45,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:45,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1018587486, now seen corresponding path program 180 times [2021-05-21 20:45:45,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:45,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680955965] [2021-05-21 20:45:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:45,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:45,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680955965] [2021-05-21 20:45:45,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680955965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:45,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968274866] [2021-05-21 20:45:45,706 INFO L93 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 [2021-05-21 20:45:45,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:45:45,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:45,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:45:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:46,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968274866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:46,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:46,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:45:46,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792232347] [2021-05-21 20:45:46,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:45:46,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:46,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:45:46,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:45:46,698 INFO L87 Difference]: Start difference. First operand 137016 states and 504964 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:47,654 INFO L93 Difference]: Finished difference Result 137774 states and 507159 transitions. [2021-05-21 20:45:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:45:47,654 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:45:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:48,044 INFO L225 Difference]: With dead ends: 137774 [2021-05-21 20:45:48,044 INFO L226 Difference]: Without dead ends: 137632 [2021-05-21 20:45:48,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 959.8ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:45:48,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137632 states. [2021-05-21 20:45:50,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137632 to 137314. [2021-05-21 20:45:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137314 states, 137313 states have (on average 3.6842760700006556) internal successors, (505899), 137313 states have internal predecessors, (505899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137314 states to 137314 states and 505899 transitions. [2021-05-21 20:45:51,807 INFO L78 Accepts]: Start accepts. Automaton has 137314 states and 505899 transitions. Word has length 33 [2021-05-21 20:45:51,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:51,807 INFO L482 AbstractCegarLoop]: Abstraction has 137314 states and 505899 transitions. [2021-05-21 20:45:51,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 137314 states and 505899 transitions. [2021-05-21 20:45:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:45:52,133 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:52,133 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:52,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-05-21 20:45:52,334 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:52,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2060260002, now seen corresponding path program 181 times [2021-05-21 20:45:52,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:52,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925354298] [2021-05-21 20:45:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:52,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:52,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925354298] [2021-05-21 20:45:52,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925354298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:52,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244811463] [2021-05-21 20:45:52,425 INFO 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 [2021-05-21 20:45:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:52,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:45:52,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:52,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244811463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:52,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:52,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:45:52,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808303986] [2021-05-21 20:45:52,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:45:52,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:45:52,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:45:52,661 INFO L87 Difference]: Start difference. First operand 137314 states and 505899 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:54,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:54,321 INFO L93 Difference]: Finished difference Result 138356 states and 508861 transitions. [2021-05-21 20:45:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:45:54,321 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:45:54,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:54,749 INFO L225 Difference]: With dead ends: 138356 [2021-05-21 20:45:54,750 INFO L226 Difference]: Without dead ends: 138306 [2021-05-21 20:45:54,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:45:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138306 states. [2021-05-21 20:45:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138306 to 137637. [2021-05-21 20:45:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137637 states, 137636 states have (on average 3.6833241303147433) internal successors, (506958), 137636 states have internal predecessors, (506958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137637 states to 137637 states and 506958 transitions. [2021-05-21 20:45:57,860 INFO L78 Accepts]: Start accepts. Automaton has 137637 states and 506958 transitions. Word has length 33 [2021-05-21 20:45:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:57,860 INFO L482 AbstractCegarLoop]: Abstraction has 137637 states and 506958 transitions. [2021-05-21 20:45:57,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 137637 states and 506958 transitions. [2021-05-21 20:45:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:45:58,111 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:58,111 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:58,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-21 20:45:58,321 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:58,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:58,321 INFO L82 PathProgramCache]: Analyzing trace with hash -138504034, now seen corresponding path program 182 times [2021-05-21 20:45:58,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:58,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488841576] [2021-05-21 20:45:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:58,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:58,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488841576] [2021-05-21 20:45:58,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488841576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:58,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211063126] [2021-05-21 20:45:58,400 INFO L93 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 [2021-05-21 20:45:58,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:45:58,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:58,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:45:58,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:58,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211063126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:58,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:58,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:45:58,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769589692] [2021-05-21 20:45:58,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:45:58,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:58,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:45:58,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:45:58,669 INFO L87 Difference]: Start difference. First operand 137637 states and 506958 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:00,097 INFO L93 Difference]: Finished difference Result 138581 states and 509568 transitions. [2021-05-21 20:46:00,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:46:00,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:46:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:00,472 INFO L225 Difference]: With dead ends: 138581 [2021-05-21 20:46:00,472 INFO L226 Difference]: Without dead ends: 138407 [2021-05-21 20:46:00,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:46:00,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138407 states. [2021-05-21 20:46:02,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138407 to 138053. [2021-05-21 20:46:03,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138053 states, 138052 states have (on average 3.681779329528004) internal successors, (508277), 138052 states have internal predecessors, (508277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138053 states to 138053 states and 508277 transitions. [2021-05-21 20:46:03,468 INFO L78 Accepts]: Start accepts. Automaton has 138053 states and 508277 transitions. Word has length 33 [2021-05-21 20:46:03,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:03,468 INFO L482 AbstractCegarLoop]: Abstraction has 138053 states and 508277 transitions. [2021-05-21 20:46:03,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 138053 states and 508277 transitions. [2021-05-21 20:46:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:46:04,328 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:46:04,328 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:46:04,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-05-21 20:46:04,545 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:46:04,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:46:04,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1821858026, now seen corresponding path program 183 times [2021-05-21 20:46:04,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:46:04,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041190747] [2021-05-21 20:46:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:46:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:04,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:46:04,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041190747] [2021-05-21 20:46:04,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041190747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:04,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654760977] [2021-05-21 20:46:04,641 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 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 [2021-05-21 20:46:04,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:46:04,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:46:04,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:46:04,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:46:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:04,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654760977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:04,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:46:04,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:46:04,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8993426] [2021-05-21 20:46:04,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:46:04,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:46:04,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:46:04,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:46:04,867 INFO L87 Difference]: Start difference. First operand 138053 states and 508277 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:05,715 INFO L93 Difference]: Finished difference Result 138483 states and 509458 transitions. [2021-05-21 20:46:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:46:05,716 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:46:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:06,108 INFO L225 Difference]: With dead ends: 138483 [2021-05-21 20:46:06,109 INFO L226 Difference]: Without dead ends: 138301 [2021-05-21 20:46:06,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:46:06,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138301 states. [2021-05-21 20:46:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138301 to 138093. [2021-05-21 20:46:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138093 states, 138092 states have (on average 3.6815239115951686) internal successors, (508389), 138092 states have internal predecessors, (508389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138093 states to 138093 states and 508389 transitions. [2021-05-21 20:46:10,082 INFO L78 Accepts]: Start accepts. Automaton has 138093 states and 508389 transitions. Word has length 33 [2021-05-21 20:46:10,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:10,082 INFO L482 AbstractCegarLoop]: Abstraction has 138093 states and 508389 transitions. [2021-05-21 20:46:10,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:10,083 INFO L276 IsEmpty]: Start isEmpty. Operand 138093 states and 508389 transitions. [2021-05-21 20:46:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:46:10,352 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:46:10,352 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:46:10,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:46:10,557 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:46:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:46:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash -137840346, now seen corresponding path program 184 times [2021-05-21 20:46:10,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:46:10,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167341389] [2021-05-21 20:46:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:46:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:10,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:46:10,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167341389] [2021-05-21 20:46:10,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167341389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:10,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235394400] [2021-05-21 20:46:10,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:46:10,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:46:10,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:46:10,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:46:10,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:46:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:10,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235394400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:10,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:46:10,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:46:10,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846800634] [2021-05-21 20:46:10,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:46:10,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:46:10,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:46:10,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:46:10,863 INFO L87 Difference]: Start difference. First operand 138093 states and 508389 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:12,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:12,358 INFO L93 Difference]: Finished difference Result 138781 states and 510361 transitions. [2021-05-21 20:46:12,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:46:12,359 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:46:12,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:12,783 INFO L225 Difference]: With dead ends: 138781 [2021-05-21 20:46:12,783 INFO L226 Difference]: Without dead ends: 138699 [2021-05-21 20:46:12,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:46:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138699 states. [2021-05-21 20:46:15,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138699 to 138281. [2021-05-21 20:46:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138281 states, 138280 states have (on average 3.6812481920740527) internal successors, (509043), 138280 states have internal predecessors, (509043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138281 states to 138281 states and 509043 transitions. [2021-05-21 20:46:15,894 INFO L78 Accepts]: Start accepts. Automaton has 138281 states and 509043 transitions. Word has length 33 [2021-05-21 20:46:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:15,894 INFO L482 AbstractCegarLoop]: Abstraction has 138281 states and 509043 transitions. [2021-05-21 20:46:15,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 138281 states and 509043 transitions. [2021-05-21 20:46:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:46:16,147 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:46:16,147 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:46:16,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:46:16,348 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:46:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:46:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1939105810, now seen corresponding path program 185 times [2021-05-21 20:46:16,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:46:16,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314200883] [2021-05-21 20:46:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:46:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:16,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:46:16,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314200883] [2021-05-21 20:46:16,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314200883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:16,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115529045] [2021-05-21 20:46:16,419 INFO L93 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 [2021-05-21 20:46:16,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 20:46:16,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:46:16,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:46:16,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:46:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:16,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115529045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:16,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:46:16,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:46:16,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408364141] [2021-05-21 20:46:16,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:46:16,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:46:16,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:46:16,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:46:16,646 INFO L87 Difference]: Start difference. First operand 138281 states and 509043 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:18,167 INFO L93 Difference]: Finished difference Result 138841 states and 510581 transitions. [2021-05-21 20:46:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:46:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:46:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:18,559 INFO L225 Difference]: With dead ends: 138841 [2021-05-21 20:46:18,559 INFO L226 Difference]: Without dead ends: 138765 [2021-05-21 20:46:18,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 244.1ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:46:18,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138765 states. [2021-05-21 20:46:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138765 to 138390. [2021-05-21 20:46:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138390 states, 138389 states have (on average 3.6810729176451886) internal successors, (509420), 138389 states have internal predecessors, (509420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138390 states to 138390 states and 509420 transitions. [2021-05-21 20:46:21,575 INFO L78 Accepts]: Start accepts. Automaton has 138390 states and 509420 transitions. Word has length 33 [2021-05-21 20:46:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:21,575 INFO L482 AbstractCegarLoop]: Abstraction has 138390 states and 509420 transitions. [2021-05-21 20:46:21,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 138390 states and 509420 transitions. [2021-05-21 20:46:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:46:22,839 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:46:22,839 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:46:23,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-05-21 20:46:23,061 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:46:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:46:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1744422478, now seen corresponding path program 186 times [2021-05-21 20:46:23,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:46:23,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756047773] [2021-05-21 20:46:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:46:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:23,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:46:23,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756047773] [2021-05-21 20:46:23,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756047773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:23,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148984185] [2021-05-21 20:46:23,187 INFO L93 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 [2021-05-21 20:46:23,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 20:46:23,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:46:23,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:46:23,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:46:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:23,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148984185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:23,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:46:23,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-05-21 20:46:23,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693156721] [2021-05-21 20:46:23,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 20:46:23,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:46:23,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 20:46:23,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:46:23,506 INFO L87 Difference]: Start difference. First operand 138390 states and 509420 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:24,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:24,689 INFO L93 Difference]: Finished difference Result 139561 states and 512775 transitions. [2021-05-21 20:46:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:46:24,689 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:46:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:25,178 INFO L225 Difference]: With dead ends: 139561 [2021-05-21 20:46:25,178 INFO L226 Difference]: Without dead ends: 139512 [2021-05-21 20:46:25,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:46:25,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139512 states. [2021-05-21 20:46:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139512 to 138609. [2021-05-21 20:46:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138609 states, 138608 states have (on average 3.681490245873254) internal successors, (510284), 138608 states have internal predecessors, (510284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138609 states to 138609 states and 510284 transitions. [2021-05-21 20:46:28,884 INFO L78 Accepts]: Start accepts. Automaton has 138609 states and 510284 transitions. Word has length 33 [2021-05-21 20:46:28,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:28,885 INFO L482 AbstractCegarLoop]: Abstraction has 138609 states and 510284 transitions. [2021-05-21 20:46:28,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand 138609 states and 510284 transitions. [2021-05-21 20:46:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:46:29,215 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:46:29,215 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:46:29,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:46:29,415 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:46:29,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:46:29,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1200847454, now seen corresponding path program 187 times [2021-05-21 20:46:29,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:46:29,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703045068] [2021-05-21 20:46:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:46:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:46:29,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:46:29,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703045068] [2021-05-21 20:46:29,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703045068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:29,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592651652] [2021-05-21 20:46:29,511 INFO 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 [2021-05-21 20:46:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:29,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:46:29,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:46:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:29,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592651652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:29,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:46:29,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:46:29,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418468061] [2021-05-21 20:46:29,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:46:29,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:46:29,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:46:29,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:46:29,741 INFO L87 Difference]: Start difference. First operand 138609 states and 510284 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:31,414 INFO L93 Difference]: Finished difference Result 139165 states and 511834 transitions. [2021-05-21 20:46:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:46:31,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:46:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:31,826 INFO L225 Difference]: With dead ends: 139165 [2021-05-21 20:46:31,826 INFO L226 Difference]: Without dead ends: 139021 [2021-05-21 20:46:31,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:46:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139021 states. [2021-05-21 20:46:34,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139021 to 138669. [2021-05-21 20:46:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138669 states, 138668 states have (on average 3.6814261401332677) internal successors, (510496), 138668 states have internal predecessors, (510496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138669 states to 138669 states and 510496 transitions. [2021-05-21 20:46:34,932 INFO L78 Accepts]: Start accepts. Automaton has 138669 states and 510496 transitions. Word has length 33 [2021-05-21 20:46:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:34,932 INFO L482 AbstractCegarLoop]: Abstraction has 138669 states and 510496 transitions. [2021-05-21 20:46:34,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 138669 states and 510496 transitions. [2021-05-21 20:46:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:46:35,183 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:46:35,183 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:46:35,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:46:35,384 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:46:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:46:35,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1938066470, now seen corresponding path program 188 times [2021-05-21 20:46:35,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:46:35,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726054969] [2021-05-21 20:46:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:46:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:46:35,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:46:35,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726054969] [2021-05-21 20:46:35,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726054969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:35,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341971905] [2021-05-21 20:46:35,470 INFO L93 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 [2021-05-21 20:46:35,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:46:35,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:46:35,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:46:35,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:46:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:35,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341971905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:35,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:46:35,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:46:35,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883397591] [2021-05-21 20:46:35,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:46:35,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:46:35,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:46:35,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:46:35,689 INFO L87 Difference]: Start difference. First operand 138669 states and 510496 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:37,170 INFO L93 Difference]: Finished difference Result 139131 states and 511744 transitions. [2021-05-21 20:46:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:46:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:46:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:37,575 INFO L225 Difference]: With dead ends: 139131 [2021-05-21 20:46:37,576 INFO L226 Difference]: Without dead ends: 139071 [2021-05-21 20:46:37,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:46:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139071 states. [2021-05-21 20:46:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139071 to 138677. [2021-05-21 20:46:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138677 states, 138676 states have (on average 3.681415673945023) internal successors, (510524), 138676 states have internal predecessors, (510524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138677 states to 138677 states and 510524 transitions. [2021-05-21 20:46:40,696 INFO L78 Accepts]: Start accepts. Automaton has 138677 states and 510524 transitions. Word has length 33 [2021-05-21 20:46:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:40,696 INFO L482 AbstractCegarLoop]: Abstraction has 138677 states and 510524 transitions. [2021-05-21 20:46:40,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 138677 states and 510524 transitions. [2021-05-21 20:46:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:46:41,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:46:41,595 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:46:41,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:46:41,809 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:46:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:46:41,809 INFO L82 PathProgramCache]: Analyzing trace with hash -267308122, now seen corresponding path program 189 times [2021-05-21 20:46:41,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:46:41,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363816803] [2021-05-21 20:46:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:46:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:41,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:46:41,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363816803] [2021-05-21 20:46:41,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363816803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:41,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142034483] [2021-05-21 20:46:41,887 INFO L93 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 [2021-05-21 20:46:41,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:46:41,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:46:41,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:46:41,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:46:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:42,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142034483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:42,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:46:42,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:46:42,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135707789] [2021-05-21 20:46:42,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:46:42,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:46:42,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:46:42,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:46:42,157 INFO L87 Difference]: Start difference. First operand 138677 states and 510524 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:43,003 INFO L93 Difference]: Finished difference Result 139123 states and 511717 transitions. [2021-05-21 20:46:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:46:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:46:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:43,396 INFO L225 Difference]: With dead ends: 139123 [2021-05-21 20:46:43,396 INFO L226 Difference]: Without dead ends: 138985 [2021-05-21 20:46:43,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:46:44,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138985 states. [2021-05-21 20:46:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138985 to 138765. [2021-05-21 20:46:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138765 states, 138764 states have (on average 3.68086103023839) internal successors, (510771), 138764 states have internal predecessors, (510771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138765 states to 138765 states and 510771 transitions. [2021-05-21 20:46:47,355 INFO L78 Accepts]: Start accepts. Automaton has 138765 states and 510771 transitions. Word has length 33 [2021-05-21 20:46:47,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:47,355 INFO L482 AbstractCegarLoop]: Abstraction has 138765 states and 510771 transitions. [2021-05-21 20:46:47,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:47,355 INFO L276 IsEmpty]: Start isEmpty. Operand 138765 states and 510771 transitions. [2021-05-21 20:46:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:46:47,635 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:46:47,635 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:46:47,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:46:47,836 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:46:47,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:46:47,836 INFO L82 PathProgramCache]: Analyzing trace with hash 200090734, now seen corresponding path program 190 times [2021-05-21 20:46:47,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:46:47,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709807557] [2021-05-21 20:46:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:46:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:47,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:46:47,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709807557] [2021-05-21 20:46:47,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709807557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:47,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217514431] [2021-05-21 20:46:47,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:46:47,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:46:47,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:46:47,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:46:47,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:46:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:48,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217514431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:48,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:46:48,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:46:48,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469297580] [2021-05-21 20:46:48,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:46:48,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:46:48,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:46:48,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:46:48,144 INFO L87 Difference]: Start difference. First operand 138765 states and 510771 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:49,761 INFO L93 Difference]: Finished difference Result 139574 states and 513100 transitions. [2021-05-21 20:46:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:46:49,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:46:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:50,189 INFO L225 Difference]: With dead ends: 139574 [2021-05-21 20:46:50,189 INFO L226 Difference]: Without dead ends: 139455 [2021-05-21 20:46:50,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:46:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139455 states. [2021-05-21 20:46:52,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139455 to 139022. [2021-05-21 20:46:52,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139022 states, 139021 states have (on average 3.680530279598046) internal successors, (511671), 139021 states have internal predecessors, (511671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139022 states to 139022 states and 511671 transitions. [2021-05-21 20:46:53,290 INFO L78 Accepts]: Start accepts. Automaton has 139022 states and 511671 transitions. Word has length 33 [2021-05-21 20:46:53,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:53,290 INFO L482 AbstractCegarLoop]: Abstraction has 139022 states and 511671 transitions. [2021-05-21 20:46:53,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 139022 states and 511671 transitions. [2021-05-21 20:46:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:46:53,540 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:46:53,540 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:46:53,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:46:53,741 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:46:53,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:46:53,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1065307430, now seen corresponding path program 191 times [2021-05-21 20:46:53,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:46:53,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852594579] [2021-05-21 20:46:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:46:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:46:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:46:53,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:46:53,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852594579] [2021-05-21 20:46:53,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852594579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:53,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554499982] [2021-05-21 20:46:53,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:46:53,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:46:53,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:46:53,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:46:53,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:46:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:46:54,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554499982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:46:54,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:46:54,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:46:54,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840547956] [2021-05-21 20:46:54,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:46:54,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:46:54,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:46:54,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:46:54,115 INFO L87 Difference]: Start difference. First operand 139022 states and 511671 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:46:55,753 INFO L93 Difference]: Finished difference Result 139748 states and 513678 transitions. [2021-05-21 20:46:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:46:55,753 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:46:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:46:56,135 INFO L225 Difference]: With dead ends: 139748 [2021-05-21 20:46:56,135 INFO L226 Difference]: Without dead ends: 139613 [2021-05-21 20:46:56,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 309.0ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:46:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139613 states. [2021-05-21 20:46:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139613 to 139152. [2021-05-21 20:46:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139152 states, 139151 states have (on average 3.6803544351100603) internal successors, (512125), 139151 states have internal predecessors, (512125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139152 states to 139152 states and 512125 transitions. [2021-05-21 20:46:59,947 INFO L78 Accepts]: Start accepts. Automaton has 139152 states and 512125 transitions. Word has length 33 [2021-05-21 20:46:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:46:59,947 INFO L482 AbstractCegarLoop]: Abstraction has 139152 states and 512125 transitions. [2021-05-21 20:46:59,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:46:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 139152 states and 512125 transitions. [2021-05-21 20:47:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:47:00,241 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:47:00,241 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:47:00,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-21 20:47:00,442 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:47:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:47:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2130130398, now seen corresponding path program 192 times [2021-05-21 20:47:00,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:47:00,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783984611] [2021-05-21 20:47:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:47:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:47:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:47:00,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:47:00,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783984611] [2021-05-21 20:47:00,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783984611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:47:00,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645235924] [2021-05-21 20:47:00,517 INFO L93 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 [2021-05-21 20:47:00,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:47:00,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:47:00,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:47:00,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:47:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:47:00,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645235924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:47:00,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:47:00,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:47:00,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683037851] [2021-05-21 20:47:00,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:47:00,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:47:00,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:47:00,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:47:00,735 INFO L87 Difference]: Start difference. First operand 139152 states and 512125 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:47:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:47:02,226 INFO L93 Difference]: Finished difference Result 139830 states and 514036 transitions. [2021-05-21 20:47:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:47:02,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:47:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:47:02,678 INFO L225 Difference]: With dead ends: 139830 [2021-05-21 20:47:02,679 INFO L226 Difference]: Without dead ends: 139671 [2021-05-21 20:47:02,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:47:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139671 states. [2021-05-21 20:47:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139671 to 139307. [2021-05-21 20:47:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139307 states, 139306 states have (on average 3.6801071023502216) internal successors, (512661), 139306 states have internal predecessors, (512661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:47:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139307 states to 139307 states and 512661 transitions. [2021-05-21 20:47:05,843 INFO L78 Accepts]: Start accepts. Automaton has 139307 states and 512661 transitions. Word has length 33 [2021-05-21 20:47:05,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:47:05,843 INFO L482 AbstractCegarLoop]: Abstraction has 139307 states and 512661 transitions. [2021-05-21 20:47:05,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:47:05,843 INFO L276 IsEmpty]: Start isEmpty. Operand 139307 states and 512661 transitions. [2021-05-21 20:47:06,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 20:47:06,099 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:47:06,099 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:47:06,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-05-21 20:47:06,300 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:47:06,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:47:06,300 INFO L82 PathProgramCache]: Analyzing trace with hash -735597726, now seen corresponding path program 193 times [2021-05-21 20:47:06,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:47:06,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090004130] [2021-05-21 20:47:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:47:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:47:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:47:06,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:47:06,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090004130] [2021-05-21 20:47:06,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090004130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:47:06,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013390958] [2021-05-21 20:47:06,373 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 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 [2021-05-21 20:47:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:47:06,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 20:47:06,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:47:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:47:06,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013390958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:47:06,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:47:06,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-21 20:47:06,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447511115] [2021-05-21 20:47:06,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 20:47:06,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:47:06,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 20:47:06,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:47:06,591 INFO L87 Difference]: Start difference. First operand 139307 states and 512661 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:47:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:47:08,118 INFO L93 Difference]: Finished difference Result 139982 states and 514553 transitions. [2021-05-21 20:47:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:47:08,119 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 20:47:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:47:08,522 INFO L225 Difference]: With dead ends: 139982 [2021-05-21 20:47:08,523 INFO L226 Difference]: Without dead ends: 139865 [2021-05-21 20:47:08,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:47:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139865 states. [2021-05-21 20:47:11,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139865 to 139533. [2021-05-21 20:47:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139533 states, 139532 states have (on average 3.679306539001806) internal successors, (513381), 139532 states have internal predecessors, (513381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:47:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139533 states to 139533 states and 513381 transitions. [2021-05-21 20:47:11,959 INFO L78 Accepts]: Start accepts. Automaton has 139533 states and 513381 transitions. Word has length 33 [2021-05-21 20:47:11,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:47:11,959 INFO L482 AbstractCegarLoop]: Abstraction has 139533 states and 513381 transitions. [2021-05-21 20:47:11,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:47:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 139533 states and 513381 transitions. Received shutdown request... [2021-05-21 20:47:12,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-05-21 20:47:12,989 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 20:47:12,991 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 20:47:12,992 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 20:47:12,995 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 08:47:12 BasicIcfg [2021-05-21 20:47:12,995 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 20:47:12,995 INFO L168 Benchmark]: Toolchain (without parser) took 662029.62 ms. Allocated memory was 362.8 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 341.9 MB in the beginning and 14.0 GB in the end (delta: -13.7 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.0 GB. [2021-05-21 20:47:12,996 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 362.8 MB. Free memory was 343.0 MB in the beginning and 342.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:47:12,996 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.61 ms. Allocated memory is still 362.8 MB. Free memory was 341.8 MB in the beginning and 340.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:47:12,996 INFO L168 Benchmark]: Boogie Preprocessor took 17.66 ms. Allocated memory is still 362.8 MB. Free memory was 340.4 MB in the beginning and 339.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:47:12,996 INFO L168 Benchmark]: RCFGBuilder took 304.54 ms. Allocated memory is still 362.8 MB. Free memory was 339.3 MB in the beginning and 326.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-21 20:47:12,996 INFO L168 Benchmark]: TraceAbstraction took 661673.73 ms. Allocated memory was 362.8 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 326.4 MB in the beginning and 14.0 GB in the end (delta: -13.7 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.0 GB. [2021-05-21 20:47:12,996 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 362.8 MB. Free memory was 343.0 MB in the beginning and 342.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.61 ms. Allocated memory is still 362.8 MB. Free memory was 341.8 MB in the beginning and 340.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.66 ms. Allocated memory is still 362.8 MB. Free memory was 340.4 MB in the beginning and 339.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 304.54 ms. Allocated memory is still 362.8 MB. Free memory was 339.3 MB in the beginning and 326.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 661673.73 ms. Allocated memory was 362.8 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 326.4 MB in the beginning and 14.0 GB in the end (delta: -13.7 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while IsEmpty was searching accepting run (input had 139533 states). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 661532.6ms, OverallIterations: 202, TraceHistogramMax: 3, EmptinessCheckTime: 35783.7ms, AutomataDifference: 204035.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12013 SDtfs, 24604 SDslu, 122184 SDs, 0 SdLazy, 82694 SolverSat, 3888 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34009.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8736 GetRequests, 4358 SyntacticMatches, 48 SemanticMatches, 4330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33514 ImplicationChecksByTransitivity, 47928.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=139533occurred in iteration=202, InterpolantAutomatonStates: 3552, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 324076.8ms AutomataMinimizationTime, 202 MinimizatonAttempts, 695277 StatesRemovedByMinimization, 202 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 657.0ms SsaConstructionTime, 2184.6ms SatisfiabilityAnalysisTime, 50114.4ms InterpolantComputationTime, 11423 NumberOfCodeBlocks, 11407 NumberOfCodeBlocksAsserted, 754 NumberOfCheckSat, 11026 ConstructedInterpolants, 0 QuantifiedInterpolants, 148014 SizeOfPredicates, 819 NumberOfNonLiveVariables, 15750 ConjunctsInSsa, 3491 ConjunctsInUnsatCore, 397 InterpolantComputations, 7 PerfectInterpolantSequences, 811/6866 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