/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:26:30,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:26:30,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:26:30,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 23:26:30,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 23:26:30,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 23:26:30,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 23:26:30,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 23:26:30,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 23:26:30,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 23:26:30,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 23:26:30,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 23:26:30,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 23:26:30,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 23:26:30,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 23:26:30,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 23:26:30,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-10 23:26:30,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 23:26:30,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 23:26:30,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 23:26:30,467 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 [2021-03-10 23:26:30,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:26:30,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:26:30,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:26:30,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:26:30,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:26:30,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:26:30,489 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:26:30,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:26:30,489 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:26:30,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:26:30,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:26:30,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:26:30,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:26:30,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:26:30,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:26:30,494 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:26:30,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:26:30,494 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:26:30,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:26:30,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:26:30,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:26:30,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:26:30,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:26:30,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:26:30,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:26:30,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:26:30,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:26:30,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:26:30,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:26:30,495 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:26:30,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:26:30,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:26:30,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:26:30,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:26:30,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:26:30,790 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:26:30,791 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:26:30,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl [2021-03-10 23:26:30,792 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl' [2021-03-10 23:26:30,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:26:30,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:26:30,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:26:30,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:26:30,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:26:30,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:30" (1/1) ... [2021-03-10 23:26:30,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:30" (1/1) ... [2021-03-10 23:26:30,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:26:30,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:26:30,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:26:30,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:26:30,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:30" (1/1) ... [2021-03-10 23:26:30,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:30" (1/1) ... [2021-03-10 23:26:30,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:30" (1/1) ... [2021-03-10 23:26:30,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:30" (1/1) ... [2021-03-10 23:26:30,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:30" (1/1) ... [2021-03-10 23:26:30,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:30" (1/1) ... [2021-03-10 23:26:30,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:30" (1/1) ... [2021-03-10 23:26:30,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:26:30,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:26:30,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:26:30,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:26:30,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:30" (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 [2021-03-10 23:26:30,942 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:26:30,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:26:30,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:26:30,943 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:26:30,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:26:30,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:26:30,943 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:26:30,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:26:30,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:26:30,943 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 23:26:30,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 23:26:30,944 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 23:26:30,945 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 23:26:31,341 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:26:31,342 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-03-10 23:26:31,342 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 23:26:31,342 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-03-10 23:26:31,343 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-03-10 23:26:31,343 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:26:31 BoogieIcfgContainer [2021-03-10 23:26:31,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:26:31,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:26:31,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:26:31,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:26:31,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:26:30" (1/2) ... [2021-03-10 23:26:31,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b2620b and model type commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:26:31, skipping insertion in model container [2021-03-10 23:26:31,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:26:31" (2/2) ... [2021-03-10 23:26:31,349 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.bpl [2021-03-10 23:26:31,352 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:26:31,353 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:26:31,356 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:26:31,356 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:26:31,375 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 23:26:31,387 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 23:26:31,401 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:26:31,401 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:26:31,401 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:26:31,401 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:26:31,401 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:26:31,401 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:26:31,401 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:26:31,401 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:26:31,413 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 64 flow [2021-03-10 23:26:31,422 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 23:26:31,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:31,429 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:31,429 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:31,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:31,435 INFO L82 PathProgramCache]: Analyzing trace with hash -628206710, now seen corresponding path program 1 times [2021-03-10 23:26:31,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:31,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665160225] [2021-03-10 23:26:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:31,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665160225] [2021-03-10 23:26:31,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:26:31,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 23:26:31,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8324385] [2021-03-10 23:26:31,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:26:31,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:31,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:26:31,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:26:31,561 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:31,604 INFO L93 Difference]: Finished difference Result 46 states and 118 transitions. [2021-03-10 23:26:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:26:31,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 23:26:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:31,612 INFO L225 Difference]: With dead ends: 46 [2021-03-10 23:26:31,612 INFO L226 Difference]: Without dead ends: 42 [2021-03-10 23:26:31,613 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:26:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-03-10 23:26:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-03-10 23:26:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 109 transitions. [2021-03-10 23:26:31,650 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 109 transitions. Word has length 12 [2021-03-10 23:26:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:31,651 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 109 transitions. [2021-03-10 23:26:31,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 109 transitions. [2021-03-10 23:26:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 23:26:31,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:31,653 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:31,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:26:31,654 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:31,657 INFO L82 PathProgramCache]: Analyzing trace with hash 402586222, now seen corresponding path program 1 times [2021-03-10 23:26:31,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:31,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785228743] [2021-03-10 23:26:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:31,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785228743] [2021-03-10 23:26:31,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:26:31,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 23:26:31,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631143622] [2021-03-10 23:26:31,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:26:31,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:31,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:26:31,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:26:31,725 INFO L87 Difference]: Start difference. First operand 42 states and 109 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:31,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:31,732 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2021-03-10 23:26:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:26:31,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 23:26:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:31,733 INFO L225 Difference]: With dead ends: 59 [2021-03-10 23:26:31,733 INFO L226 Difference]: Without dead ends: 57 [2021-03-10 23:26:31,734 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:26:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-03-10 23:26:31,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-03-10 23:26:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 115 transitions. [2021-03-10 23:26:31,739 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 115 transitions. Word has length 13 [2021-03-10 23:26:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:31,739 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 115 transitions. [2021-03-10 23:26:31,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:31,739 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 115 transitions. [2021-03-10 23:26:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 23:26:31,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:31,740 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:31,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 23:26:31,740 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:31,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:31,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1959261122, now seen corresponding path program 1 times [2021-03-10 23:26:31,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:31,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255074027] [2021-03-10 23:26:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255074027] [2021-03-10 23:26:31,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433121218] [2021-03-10 23:26:31,770 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 [2021-03-10 23:26:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:31,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 23:26:31,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:31,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:31,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-03-10 23:26:31,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816443612] [2021-03-10 23:26:31,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:26:31,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:31,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:26:31,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:26:31,906 INFO L87 Difference]: Start difference. First operand 46 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:31,928 INFO L93 Difference]: Finished difference Result 65 states and 168 transitions. [2021-03-10 23:26:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:26:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 23:26:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:31,929 INFO L225 Difference]: With dead ends: 65 [2021-03-10 23:26:31,929 INFO L226 Difference]: Without dead ends: 59 [2021-03-10 23:26:31,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:26:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-03-10 23:26:31,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-03-10 23:26:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.7115384615384617) internal successors, (141), 52 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 141 transitions. [2021-03-10 23:26:31,934 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 141 transitions. Word has length 13 [2021-03-10 23:26:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:31,934 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 141 transitions. [2021-03-10 23:26:31,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 141 transitions. [2021-03-10 23:26:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 23:26:31,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:31,935 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:32,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 23:26:32,149 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:32,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:32,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1085270368, now seen corresponding path program 1 times [2021-03-10 23:26:32,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:32,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290536921] [2021-03-10 23:26:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:32,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290536921] [2021-03-10 23:26:32,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871412409] [2021-03-10 23:26:32,188 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 [2021-03-10 23:26:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:32,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 23:26:32,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:32,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:32,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-03-10 23:26:32,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581080534] [2021-03-10 23:26:32,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:26:32,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:32,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:26:32,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:26:32,253 INFO L87 Difference]: Start difference. First operand 53 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:32,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:32,266 INFO L93 Difference]: Finished difference Result 68 states and 170 transitions. [2021-03-10 23:26:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:26:32,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 23:26:32,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:32,267 INFO L225 Difference]: With dead ends: 68 [2021-03-10 23:26:32,267 INFO L226 Difference]: Without dead ends: 49 [2021-03-10 23:26:32,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:26:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-03-10 23:26:32,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-03-10 23:26:32,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.625) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 126 transitions. [2021-03-10 23:26:32,271 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 126 transitions. Word has length 13 [2021-03-10 23:26:32,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:32,272 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 126 transitions. [2021-03-10 23:26:32,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 126 transitions. [2021-03-10 23:26:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 23:26:32,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:32,273 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:32,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:32,477 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:32,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:32,477 INFO L82 PathProgramCache]: Analyzing trace with hash -242961336, now seen corresponding path program 1 times [2021-03-10 23:26:32,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:32,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034403247] [2021-03-10 23:26:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:32,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034403247] [2021-03-10 23:26:32,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:26:32,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 23:26:32,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60404288] [2021-03-10 23:26:32,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:26:32,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:32,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:26:32,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:26:32,524 INFO L87 Difference]: Start difference. First operand 49 states and 126 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:32,531 INFO L93 Difference]: Finished difference Result 29 states and 63 transitions. [2021-03-10 23:26:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:26:32,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 23:26:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:32,532 INFO L225 Difference]: With dead ends: 29 [2021-03-10 23:26:32,533 INFO L226 Difference]: Without dead ends: 28 [2021-03-10 23:26:32,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:26:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-03-10 23:26:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-03-10 23:26:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 62 transitions. [2021-03-10 23:26:32,535 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 62 transitions. Word has length 14 [2021-03-10 23:26:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:32,535 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 62 transitions. [2021-03-10 23:26:32,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 62 transitions. [2021-03-10 23:26:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 23:26:32,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:32,537 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:32,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 23:26:32,537 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:32,538 INFO L82 PathProgramCache]: Analyzing trace with hash -757524308, now seen corresponding path program 1 times [2021-03-10 23:26:32,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:32,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018029020] [2021-03-10 23:26:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:32,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018029020] [2021-03-10 23:26:32,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799761930] [2021-03-10 23:26:32,587 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 [2021-03-10 23:26:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:32,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:26:32,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:32,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:32,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-03-10 23:26:32,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945578319] [2021-03-10 23:26:32,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:26:32,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:26:32,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:26:32,701 INFO L87 Difference]: Start difference. First operand 28 states and 62 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:32,745 INFO L93 Difference]: Finished difference Result 47 states and 113 transitions. [2021-03-10 23:26:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:26:32,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 23:26:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:32,748 INFO L225 Difference]: With dead ends: 47 [2021-03-10 23:26:32,748 INFO L226 Difference]: Without dead ends: 43 [2021-03-10 23:26:32,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:26:32,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-03-10 23:26:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-03-10 23:26:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 41 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 103 transitions. [2021-03-10 23:26:32,758 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 103 transitions. Word has length 14 [2021-03-10 23:26:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:32,758 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 103 transitions. [2021-03-10 23:26:32,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 103 transitions. [2021-03-10 23:26:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 23:26:32,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:32,759 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:32,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:32,960 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1436036254, now seen corresponding path program 1 times [2021-03-10 23:26:32,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:32,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39917044] [2021-03-10 23:26:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:33,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39917044] [2021-03-10 23:26:33,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703241898] [2021-03-10 23:26:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 23:26:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:33,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:26:33,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:33,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 23:26:33,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-03-10 23:26:33,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469085897] [2021-03-10 23:26:33,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:26:33,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:33,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:26:33,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:26:33,124 INFO L87 Difference]: Start difference. First operand 42 states and 103 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-03-10 23:26:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:33,141 INFO L93 Difference]: Finished difference Result 60 states and 135 transitions. [2021-03-10 23:26:33,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:26:33,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 [2021-03-10 23:26:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:33,142 INFO L225 Difference]: With dead ends: 60 [2021-03-10 23:26:33,142 INFO L226 Difference]: Without dead ends: 58 [2021-03-10 23:26:33,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:26:33,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-03-10 23:26:33,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-03-10 23:26:33,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2021-03-10 23:26:33,145 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2021-03-10 23:26:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:33,145 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2021-03-10 23:26:33,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-03-10 23:26:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2021-03-10 23:26:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 23:26:33,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:33,146 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:33,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:33,352 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:33,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:33,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2049584416, now seen corresponding path program 2 times [2021-03-10 23:26:33,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:33,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405095178] [2021-03-10 23:26:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:33,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405095178] [2021-03-10 23:26:33,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242462205] [2021-03-10 23:26:33,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:26:33,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:26:33,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:33,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 23:26:33,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:33,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:33,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 23:26:33,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952494425] [2021-03-10 23:26:33,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:26:33,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:33,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:26:33,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:26:33,539 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:33,596 INFO L93 Difference]: Finished difference Result 71 states and 170 transitions. [2021-03-10 23:26:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:26:33,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 23:26:33,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:33,597 INFO L225 Difference]: With dead ends: 71 [2021-03-10 23:26:33,597 INFO L226 Difference]: Without dead ends: 61 [2021-03-10 23:26:33,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:26:33,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-03-10 23:26:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2021-03-10 23:26:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.522727272727273) internal successors, (111), 44 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 111 transitions. [2021-03-10 23:26:33,599 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 111 transitions. Word has length 15 [2021-03-10 23:26:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:33,600 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 111 transitions. [2021-03-10 23:26:33,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 111 transitions. [2021-03-10 23:26:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 23:26:33,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:33,600 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:33,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:33,817 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash 833536548, now seen corresponding path program 3 times [2021-03-10 23:26:33,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:33,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698987731] [2021-03-10 23:26:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:33,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698987731] [2021-03-10 23:26:33,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545175073] [2021-03-10 23:26:33,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-03-10 23:26:33,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:26:33,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:33,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:26:33,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:34,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:34,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 23:26:34,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370029044] [2021-03-10 23:26:34,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:26:34,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:34,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:26:34,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:26:34,029 INFO L87 Difference]: Start difference. First operand 45 states and 111 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:34,111 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2021-03-10 23:26:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:26:34,112 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:26:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:34,112 INFO L225 Difference]: With dead ends: 80 [2021-03-10 23:26:34,112 INFO L226 Difference]: Without dead ends: 71 [2021-03-10 23:26:34,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:26:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-03-10 23:26:34,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2021-03-10 23:26:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.6964285714285716) internal successors, (151), 56 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 151 transitions. [2021-03-10 23:26:34,115 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 151 transitions. Word has length 15 [2021-03-10 23:26:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:34,115 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 151 transitions. [2021-03-10 23:26:34,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 151 transitions. [2021-03-10 23:26:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 23:26:34,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:34,116 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:34,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:34,347 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:34,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:34,348 INFO L82 PathProgramCache]: Analyzing trace with hash 36878570, now seen corresponding path program 2 times [2021-03-10 23:26:34,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:34,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024797156] [2021-03-10 23:26:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:34,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024797156] [2021-03-10 23:26:34,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081915880] [2021-03-10 23:26:34,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:26:34,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:26:34,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:34,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:34,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:34,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:34,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-03-10 23:26:34,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615868926] [2021-03-10 23:26:34,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:26:34,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:34,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:26:34,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:26:34,684 INFO L87 Difference]: Start difference. First operand 57 states and 151 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:34,766 INFO L93 Difference]: Finished difference Result 118 states and 329 transitions. [2021-03-10 23:26:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:26:34,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 23:26:34,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:34,769 INFO L225 Difference]: With dead ends: 118 [2021-03-10 23:26:34,769 INFO L226 Difference]: Without dead ends: 114 [2021-03-10 23:26:34,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:26:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-03-10 23:26:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-03-10 23:26:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 3.0675675675675675) internal successors, (227), 74 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 227 transitions. [2021-03-10 23:26:34,783 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 227 transitions. Word has length 16 [2021-03-10 23:26:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:34,783 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 227 transitions. [2021-03-10 23:26:34,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 227 transitions. [2021-03-10 23:26:34,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 23:26:34,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:34,784 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:34,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:34,993 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash 846225196, now seen corresponding path program 4 times [2021-03-10 23:26:34,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:34,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974109687] [2021-03-10 23:26:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:35,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974109687] [2021-03-10 23:26:35,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946135023] [2021-03-10 23:26:35,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-03-10 23:26:35,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:26:35,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 23:26:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:35,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:35,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 23:26:35,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980619813] [2021-03-10 23:26:35,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:26:35,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:35,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:26:35,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:26:35,170 INFO L87 Difference]: Start difference. First operand 75 states and 227 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:35,231 INFO L93 Difference]: Finished difference Result 80 states and 225 transitions. [2021-03-10 23:26:35,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:26:35,231 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 23:26:35,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:35,232 INFO L225 Difference]: With dead ends: 80 [2021-03-10 23:26:35,232 INFO L226 Difference]: Without dead ends: 77 [2021-03-10 23:26:35,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:26:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-03-10 23:26:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-03-10 23:26:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.943661971830986) internal successors, (209), 71 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 209 transitions. [2021-03-10 23:26:35,236 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 209 transitions. Word has length 16 [2021-03-10 23:26:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:35,237 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 209 transitions. [2021-03-10 23:26:35,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 209 transitions. [2021-03-10 23:26:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 23:26:35,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:35,238 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:35,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 23:26:35,451 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:35,452 INFO L82 PathProgramCache]: Analyzing trace with hash 292721696, now seen corresponding path program 3 times [2021-03-10 23:26:35,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:35,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379997241] [2021-03-10 23:26:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:35,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379997241] [2021-03-10 23:26:35,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713459698] [2021-03-10 23:26:35,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:35,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:26:35,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:35,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 23:26:35,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:35,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:35,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-03-10 23:26:35,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98334713] [2021-03-10 23:26:35,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:26:35,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:35,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:26:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:26:35,708 INFO L87 Difference]: Start difference. First operand 72 states and 209 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:35,785 INFO L93 Difference]: Finished difference Result 214 states and 593 transitions. [2021-03-10 23:26:35,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:26:35,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:26:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:35,788 INFO L225 Difference]: With dead ends: 214 [2021-03-10 23:26:35,788 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 23:26:35,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:26:35,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 23:26:35,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 101. [2021-03-10 23:26:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 3.14) internal successors, (314), 100 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 314 transitions. [2021-03-10 23:26:35,800 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 314 transitions. Word has length 17 [2021-03-10 23:26:35,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:35,800 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 314 transitions. [2021-03-10 23:26:35,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 314 transitions. [2021-03-10 23:26:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 23:26:35,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:35,805 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:36,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 23:26:36,006 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:36,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:36,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1102068322, now seen corresponding path program 4 times [2021-03-10 23:26:36,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:36,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994361936] [2021-03-10 23:26:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:36,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994361936] [2021-03-10 23:26:36,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74937064] [2021-03-10 23:26:36,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:36,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:26:36,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:36,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:26:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:36,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:36,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 23:26:36,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627641742] [2021-03-10 23:26:36,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:26:36,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:36,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:26:36,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:26:36,250 INFO L87 Difference]: Start difference. First operand 101 states and 314 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:36,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:36,318 INFO L93 Difference]: Finished difference Result 109 states and 325 transitions. [2021-03-10 23:26:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:26:36,323 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:26:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:36,325 INFO L225 Difference]: With dead ends: 109 [2021-03-10 23:26:36,325 INFO L226 Difference]: Without dead ends: 108 [2021-03-10 23:26:36,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:26:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-03-10 23:26:36,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-03-10 23:26:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 3.11) internal successors, (311), 100 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) [2021-03-10 23:26:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 311 transitions. [2021-03-10 23:26:36,329 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 311 transitions. Word has length 17 [2021-03-10 23:26:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:36,329 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 311 transitions. [2021-03-10 23:26:36,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 311 transitions. [2021-03-10 23:26:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 23:26:36,330 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:36,330 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:36,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:36,549 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1878688318, now seen corresponding path program 5 times [2021-03-10 23:26:36,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:36,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367968296] [2021-03-10 23:26:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:36,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367968296] [2021-03-10 23:26:36,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395940178] [2021-03-10 23:26:36,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:26:36,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:26:36,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:36,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 23:26:36,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:36,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:36,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 23:26:36,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890160630] [2021-03-10 23:26:36,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:26:36,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:36,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:26:36,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:26:36,716 INFO L87 Difference]: Start difference. First operand 101 states and 311 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:36,762 INFO L93 Difference]: Finished difference Result 101 states and 282 transitions. [2021-03-10 23:26:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:26:36,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:26:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:36,764 INFO L225 Difference]: With dead ends: 101 [2021-03-10 23:26:36,764 INFO L226 Difference]: Without dead ends: 83 [2021-03-10 23:26:36,765 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:26:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-03-10 23:26:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-03-10 23:26:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 3.0617283950617282) internal successors, (248), 81 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 248 transitions. [2021-03-10 23:26:36,767 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 248 transitions. Word has length 17 [2021-03-10 23:26:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:36,768 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 248 transitions. [2021-03-10 23:26:36,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 248 transitions. [2021-03-10 23:26:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:26:36,768 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:36,768 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:36,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 23:26:36,987 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:36,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:36,988 INFO L82 PathProgramCache]: Analyzing trace with hash 443270636, now seen corresponding path program 5 times [2021-03-10 23:26:36,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:36,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138391981] [2021-03-10 23:26:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:37,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138391981] [2021-03-10 23:26:37,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391607608] [2021-03-10 23:26:37,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-03-10 23:26:37,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:26:37,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:37,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 23:26:37,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:37,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:37,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 23:26:37,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621091743] [2021-03-10 23:26:37,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:26:37,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:37,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:26:37,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:26:37,420 INFO L87 Difference]: Start difference. First operand 82 states and 248 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:37,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:37,628 INFO L93 Difference]: Finished difference Result 98 states and 290 transitions. [2021-03-10 23:26:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:26:37,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 23:26:37,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:37,629 INFO L225 Difference]: With dead ends: 98 [2021-03-10 23:26:37,629 INFO L226 Difference]: Without dead ends: 94 [2021-03-10 23:26:37,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 352.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:26:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-10 23:26:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-03-10 23:26:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 3.1058823529411765) internal successors, (264), 85 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 264 transitions. [2021-03-10 23:26:37,632 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 264 transitions. Word has length 18 [2021-03-10 23:26:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:37,632 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 264 transitions. [2021-03-10 23:26:37,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 264 transitions. [2021-03-10 23:26:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 23:26:37,633 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:37,633 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:37,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:37,847 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash 815320480, now seen corresponding path program 6 times [2021-03-10 23:26:37,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:37,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092301516] [2021-03-10 23:26:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:37,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092301516] [2021-03-10 23:26:37,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778570676] [2021-03-10 23:26:37,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:26:38,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:26:38,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:38,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 23:26:38,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:38,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:38,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 23:26:38,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196043338] [2021-03-10 23:26:38,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:26:38,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:38,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:26:38,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:26:38,265 INFO L87 Difference]: Start difference. First operand 86 states and 264 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-03-10 23:26:38,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:38,350 INFO L93 Difference]: Finished difference Result 109 states and 322 transitions. [2021-03-10 23:26:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:26:38,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 19 [2021-03-10 23:26:38,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:38,351 INFO L225 Difference]: With dead ends: 109 [2021-03-10 23:26:38,351 INFO L226 Difference]: Without dead ends: 105 [2021-03-10 23:26:38,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:26:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-03-10 23:26:38,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 90. [2021-03-10 23:26:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 3.134831460674157) internal successors, (279), 89 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 279 transitions. [2021-03-10 23:26:38,354 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 279 transitions. Word has length 19 [2021-03-10 23:26:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:38,354 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 279 transitions. [2021-03-10 23:26:38,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-03-10 23:26:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 279 transitions. [2021-03-10 23:26:38,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:26:38,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:38,355 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:38,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 23:26:38,567 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:38,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:38,568 INFO L82 PathProgramCache]: Analyzing trace with hash 144022126, now seen corresponding path program 7 times [2021-03-10 23:26:38,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:38,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972412825] [2021-03-10 23:26:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:26:38,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972412825] [2021-03-10 23:26:38,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081591798] [2021-03-10 23:26:38,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-03-10 23:26:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:38,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 23:26:38,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:26:38,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:38,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 23:26:38,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591583230] [2021-03-10 23:26:38,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:26:38,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:38,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:26:38,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:26:38,915 INFO L87 Difference]: Start difference. First operand 90 states and 279 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2021-03-10 23:26:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:39,024 INFO L93 Difference]: Finished difference Result 125 states and 353 transitions. [2021-03-10 23:26:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:26:39,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 20 [2021-03-10 23:26:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:39,026 INFO L225 Difference]: With dead ends: 125 [2021-03-10 23:26:39,026 INFO L226 Difference]: Without dead ends: 121 [2021-03-10 23:26:39,026 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:26:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-03-10 23:26:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2021-03-10 23:26:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 3.0792079207920793) internal successors, (311), 101 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) [2021-03-10 23:26:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 311 transitions. [2021-03-10 23:26:39,029 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 311 transitions. Word has length 20 [2021-03-10 23:26:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:39,029 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 311 transitions. [2021-03-10 23:26:39,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2021-03-10 23:26:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 311 transitions. [2021-03-10 23:26:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:26:39,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:39,030 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:39,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:39,235 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:39,235 INFO L82 PathProgramCache]: Analyzing trace with hash -536036244, now seen corresponding path program 8 times [2021-03-10 23:26:39,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:39,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257804816] [2021-03-10 23:26:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:39,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257804816] [2021-03-10 23:26:39,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865962528] [2021-03-10 23:26:39,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:26:39,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:26:39,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:39,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:26:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:39,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:39,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-03-10 23:26:39,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128607064] [2021-03-10 23:26:39,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:26:39,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:39,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:26:39,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:26:39,684 INFO L87 Difference]: Start difference. First operand 102 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-03-10 23:26:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:39,874 INFO L93 Difference]: Finished difference Result 110 states and 314 transitions. [2021-03-10 23:26:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:26:39,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 20 [2021-03-10 23:26:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:39,876 INFO L225 Difference]: With dead ends: 110 [2021-03-10 23:26:39,876 INFO L226 Difference]: Without dead ends: 107 [2021-03-10 23:26:39,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:26:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-03-10 23:26:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2021-03-10 23:26:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.989795918367347) internal successors, (293), 98 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 293 transitions. [2021-03-10 23:26:39,879 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 293 transitions. Word has length 20 [2021-03-10 23:26:39,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:39,880 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 293 transitions. [2021-03-10 23:26:39,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-03-10 23:26:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 293 transitions. [2021-03-10 23:26:39,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:26:39,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:39,880 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:40,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:40,097 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash 329922216, now seen corresponding path program 9 times [2021-03-10 23:26:40,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:40,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085900828] [2021-03-10 23:26:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:40,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085900828] [2021-03-10 23:26:40,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163199026] [2021-03-10 23:26:40,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-03-10 23:26:40,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:26:40,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:26:40,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:26:40,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:40,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-03-10 23:26:40,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150572163] [2021-03-10 23:26:40,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:26:40,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:40,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:26:40,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:26:40,399 INFO L87 Difference]: Start difference. First operand 99 states and 293 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:40,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:40,512 INFO L93 Difference]: Finished difference Result 92 states and 261 transitions. [2021-03-10 23:26:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:26:40,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 23:26:40,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:40,513 INFO L225 Difference]: With dead ends: 92 [2021-03-10 23:26:40,513 INFO L226 Difference]: Without dead ends: 87 [2021-03-10 23:26:40,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:26:40,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-03-10 23:26:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-03-10 23:26:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.953488372093023) internal successors, (254), 86 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 254 transitions. [2021-03-10 23:26:40,518 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 254 transitions. Word has length 20 [2021-03-10 23:26:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:40,518 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 254 transitions. [2021-03-10 23:26:40,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 254 transitions. [2021-03-10 23:26:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:26:40,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:40,519 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:40,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:40,727 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:40,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:40,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1201636642, now seen corresponding path program 10 times [2021-03-10 23:26:40,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:40,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648525567] [2021-03-10 23:26:40,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:40,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648525567] [2021-03-10 23:26:40,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844769626] [2021-03-10 23:26:40,853 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 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 [2021-03-10 23:26:40,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:26:40,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:40,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:26:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:41,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:26:41,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:26:41,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:26:41,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:26:41,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:26:41,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-03-10 23:26:41,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-03-10 23:26:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:26:41,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:41,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-03-10 23:26:41,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37272641] [2021-03-10 23:26:41,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:26:41,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:41,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:26:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:26:41,213 INFO L87 Difference]: Start difference. First operand 87 states and 254 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:41,798 INFO L93 Difference]: Finished difference Result 479 states and 1188 transitions. [2021-03-10 23:26:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:26:41,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:26:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:41,801 INFO L225 Difference]: With dead ends: 479 [2021-03-10 23:26:41,801 INFO L226 Difference]: Without dead ends: 427 [2021-03-10 23:26:41,801 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 609.5ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:26:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-03-10 23:26:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 147. [2021-03-10 23:26:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.2260273972602738) internal successors, (471), 146 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 471 transitions. [2021-03-10 23:26:41,808 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 471 transitions. Word has length 21 [2021-03-10 23:26:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:41,808 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 471 transitions. [2021-03-10 23:26:41,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 471 transitions. [2021-03-10 23:26:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:26:41,809 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:41,809 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:42,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 23:26:42,024 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:42,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1129551998, now seen corresponding path program 11 times [2021-03-10 23:26:42,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:42,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033795029] [2021-03-10 23:26:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:42,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033795029] [2021-03-10 23:26:42,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661263265] [2021-03-10 23:26:42,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-03-10 23:26:42,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:26:42,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 23:26:42,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:42,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:42,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-03-10 23:26:42,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803580337] [2021-03-10 23:26:42,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:26:42,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:42,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:26:42,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:26:42,637 INFO L87 Difference]: Start difference. First operand 147 states and 471 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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) [2021-03-10 23:26:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:42,690 INFO L93 Difference]: Finished difference Result 103 states and 299 transitions. [2021-03-10 23:26:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:26:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 [2021-03-10 23:26:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:42,693 INFO L225 Difference]: With dead ends: 103 [2021-03-10 23:26:42,693 INFO L226 Difference]: Without dead ends: 101 [2021-03-10 23:26:42,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 447.8ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:26:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-03-10 23:26:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2021-03-10 23:26:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 3.0) internal successors, (291), 97 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 291 transitions. [2021-03-10 23:26:42,697 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 291 transitions. Word has length 21 [2021-03-10 23:26:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:42,697 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 291 transitions. [2021-03-10 23:26:42,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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) [2021-03-10 23:26:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 291 transitions. [2021-03-10 23:26:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:26:42,697 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:42,698 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:42,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 23:26:42,906 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:42,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2003542752, now seen corresponding path program 12 times [2021-03-10 23:26:42,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:42,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279245997] [2021-03-10 23:26:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:43,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279245997] [2021-03-10 23:26:43,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567630120] [2021-03-10 23:26:43,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-03-10 23:26:43,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:26:43,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:43,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 23:26:43,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:43,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:26:43,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:26:43,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:26:43,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:26:43,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:26:43,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:26:43,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 23:26:43,390 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:85 [2021-03-10 23:26:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:43,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:43,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 23:26:43,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957246841] [2021-03-10 23:26:43,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:26:43,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:43,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:26:43,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:26:43,572 INFO L87 Difference]: Start difference. First operand 98 states and 291 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-03-10 23:26:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:43,921 INFO L93 Difference]: Finished difference Result 116 states and 331 transitions. [2021-03-10 23:26:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:26:43,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 [2021-03-10 23:26:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:43,922 INFO L225 Difference]: With dead ends: 116 [2021-03-10 23:26:43,922 INFO L226 Difference]: Without dead ends: 110 [2021-03-10 23:26:43,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:26:43,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-03-10 23:26:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2021-03-10 23:26:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.9615384615384617) internal successors, (308), 104 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 308 transitions. [2021-03-10 23:26:43,925 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 308 transitions. Word has length 21 [2021-03-10 23:26:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:43,925 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 308 transitions. [2021-03-10 23:26:43,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-03-10 23:26:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 308 transitions. [2021-03-10 23:26:43,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:26:43,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:43,926 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:44,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:44,127 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:44,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:44,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2021450516, now seen corresponding path program 13 times [2021-03-10 23:26:44,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:44,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148982319] [2021-03-10 23:26:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:44,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148982319] [2021-03-10 23:26:44,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290175840] [2021-03-10 23:26:44,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-03-10 23:26:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:44,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 23:26:44,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:44,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:44,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 23:26:44,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960028042] [2021-03-10 23:26:44,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:26:44,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:44,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:26:44,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:26:44,860 INFO L87 Difference]: Start difference. First operand 105 states and 308 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-03-10 23:26:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:45,036 INFO L93 Difference]: Finished difference Result 142 states and 390 transitions. [2021-03-10 23:26:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:26:45,037 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:26:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:45,037 INFO L225 Difference]: With dead ends: 142 [2021-03-10 23:26:45,037 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 23:26:45,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 615.5ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:26:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 23:26:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 115. [2021-03-10 23:26:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.973684210526316) internal successors, (339), 114 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 339 transitions. [2021-03-10 23:26:45,041 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 339 transitions. Word has length 22 [2021-03-10 23:26:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:45,041 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 339 transitions. [2021-03-10 23:26:45,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-03-10 23:26:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 339 transitions. [2021-03-10 23:26:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:26:45,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:45,041 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:45,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-10 23:26:45,251 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:45,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1399526026, now seen corresponding path program 14 times [2021-03-10 23:26:45,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:45,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387575297] [2021-03-10 23:26:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:45,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387575297] [2021-03-10 23:26:45,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838602157] [2021-03-10 23:26:45,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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) [2021-03-10 23:26:45,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:26:45,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:45,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 23:26:45,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:45,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:26:45,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:26:45,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:26:45,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-03-10 23:26:45,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:26:45,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:26:45,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-03-10 23:26:45,688 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:85 [2021-03-10 23:26:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:26:45,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:45,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-03-10 23:26:45,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780447778] [2021-03-10 23:26:45,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:26:45,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:45,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:26:45,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:26:45,980 INFO L87 Difference]: Start difference. First operand 115 states and 339 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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) [2021-03-10 23:26:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:46,346 INFO L93 Difference]: Finished difference Result 228 states and 643 transitions. [2021-03-10 23:26:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:26:46,346 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 22 [2021-03-10 23:26:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:46,347 INFO L225 Difference]: With dead ends: 228 [2021-03-10 23:26:46,347 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 23:26:46,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 648.4ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:26:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 23:26:46,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 150. [2021-03-10 23:26:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 3.2550335570469797) internal successors, (485), 149 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 485 transitions. [2021-03-10 23:26:46,351 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 485 transitions. Word has length 22 [2021-03-10 23:26:46,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:46,352 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 485 transitions. [2021-03-10 23:26:46,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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) [2021-03-10 23:26:46,352 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 485 transitions. [2021-03-10 23:26:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:26:46,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:46,352 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:46,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 23:26:46,563 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:46,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:46,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1718376096, now seen corresponding path program 15 times [2021-03-10 23:26:46,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:46,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085506107] [2021-03-10 23:26:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:46,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085506107] [2021-03-10 23:26:46,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006168288] [2021-03-10 23:26:46,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-03-10 23:26:46,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:26:46,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:46,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 23:26:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:47,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:47,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 23:26:47,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143312568] [2021-03-10 23:26:47,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:26:47,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:47,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:26:47,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:26:47,233 INFO L87 Difference]: Start difference. First operand 150 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:47,531 INFO L93 Difference]: Finished difference Result 238 states and 664 transitions. [2021-03-10 23:26:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:26:47,532 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:26:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:47,533 INFO L225 Difference]: With dead ends: 238 [2021-03-10 23:26:47,533 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 23:26:47,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 651.7ms TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:26:47,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 23:26:47,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 126. [2021-03-10 23:26:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.136) internal successors, (392), 125 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 392 transitions. [2021-03-10 23:26:47,538 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 392 transitions. Word has length 23 [2021-03-10 23:26:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:47,539 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 392 transitions. [2021-03-10 23:26:47,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:47,539 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 392 transitions. [2021-03-10 23:26:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 23:26:47,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:26:47,539 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:26:47,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:26:47,755 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:26:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:26:47,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1454689826, now seen corresponding path program 16 times [2021-03-10 23:26:47,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:26:47,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800275790] [2021-03-10 23:26:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:26:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:26:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:47,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800275790] [2021-03-10 23:26:47,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587383722] [2021-03-10 23:26:47,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:26:47,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:26:47,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:26:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 23:26:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:26:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:26:48,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:26:48,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-03-10 23:26:48,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43376478] [2021-03-10 23:26:48,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:26:48,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:26:48,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:26:48,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:26:48,658 INFO L87 Difference]: Start difference. First operand 126 states and 392 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:26:49,133 INFO L93 Difference]: Finished difference Result 141 states and 257 transitions. [2021-03-10 23:26:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:26:49,133 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 23:26:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:26:49,133 INFO L225 Difference]: With dead ends: 141 [2021-03-10 23:26:49,133 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 23:26:49,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1050.1ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:26:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 23:26:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 23:26:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 23:26:49,134 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-03-10 23:26:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:26:49,134 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 23:26:49,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:26:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 23:26:49,134 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 23:26:49,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-10 23:26:49,339 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:26:49 BasicIcfg [2021-03-10 23:26:49,339 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:26:49,339 INFO L168 Benchmark]: Toolchain (without parser) took 18505.48 ms. Allocated memory was 364.9 MB in the beginning and 444.6 MB in the end (delta: 79.7 MB). Free memory was 345.1 MB in the beginning and 177.3 MB in the end (delta: 167.8 MB). Peak memory consumption was 249.5 MB. Max. memory is 16.0 GB. [2021-03-10 23:26:49,339 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 364.9 MB. Free memory was 346.4 MB in the beginning and 346.4 MB in the end (delta: 77.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:26:49,339 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.72 ms. Allocated memory is still 364.9 MB. Free memory was 344.7 MB in the beginning and 343.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:26:49,339 INFO L168 Benchmark]: Boogie Preprocessor took 12.35 ms. Allocated memory is still 364.9 MB. Free memory was 343.1 MB in the beginning and 342.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:26:49,340 INFO L168 Benchmark]: RCFGBuilder took 471.74 ms. Allocated memory is still 364.9 MB. Free memory was 342.0 MB in the beginning and 339.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 21.3 MB. Max. memory is 16.0 GB. [2021-03-10 23:26:49,340 INFO L168 Benchmark]: TraceAbstraction took 17994.06 ms. Allocated memory was 364.9 MB in the beginning and 444.6 MB in the end (delta: 79.7 MB). Free memory was 339.1 MB in the beginning and 177.3 MB in the end (delta: 161.8 MB). Peak memory consumption was 240.8 MB. Max. memory is 16.0 GB. [2021-03-10 23:26:49,340 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 0.09 ms. Allocated memory is still 364.9 MB. Free memory was 346.4 MB in the beginning and 346.4 MB in the end (delta: 77.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.72 ms. Allocated memory is still 364.9 MB. Free memory was 344.7 MB in the beginning and 343.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.35 ms. Allocated memory is still 364.9 MB. Free memory was 343.1 MB in the beginning and 342.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 471.74 ms. Allocated memory is still 364.9 MB. Free memory was 342.0 MB in the beginning and 339.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 21.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 17994.06 ms. Allocated memory was 364.9 MB in the beginning and 444.6 MB in the end (delta: 79.7 MB). Free memory was 339.1 MB in the beginning and 177.3 MB in the end (delta: 161.8 MB). Peak memory consumption was 240.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 125]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17936.9ms, OverallIterations: 26, TraceHistogramMax: 7, EmptinessCheckTime: 24.2ms, AutomataDifference: 3727.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 553 SDtfs, 914 SDslu, 4440 SDs, 0 SdLazy, 2207 SolverSat, 205 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1175.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 649 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 7130.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=24, InterpolantAutomatonStates: 232, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 134.8ms AutomataMinimizationTime, 26 MinimizatonAttempts, 710 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 150.9ms SsaConstructionTime, 540.1ms SatisfiabilityAnalysisTime, 7922.1ms InterpolantComputationTime, 879 NumberOfCodeBlocks, 878 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 830 ConstructedInterpolants, 29 QuantifiedInterpolants, 9799 SizeOfPredicates, 210 NumberOfNonLiveVariables, 1155 ConjunctsInSsa, 272 ConjunctsInUnsatCore, 49 InterpolantComputations, 4 PerfectInterpolantSequences, 175/615 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 proved your program to be correct! Received shutdown request...