java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:12:35,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:12:35,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:12:35,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 06:12:35,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:12:35,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:12:35,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:12:35,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:12:35,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:12:35,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:12:35,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:12:35,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:12:35,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:12:35,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:12:35,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:12:35,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:12:35,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:12:35,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:12:35,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:12:35,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:12:35,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-08 06:12:35,385 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:12:35,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:12:35,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:12:35,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:12:35,387 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:12:35,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:12:35,387 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:12:35,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:12:35,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:12:35,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:12:35,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:12:35,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:12:35,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:12:35,389 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:12:35,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:12:35,389 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:12:35,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:12:35,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:12:35,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:12:35,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:12:35,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:12:35,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:12:35,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:12:35,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:12:35,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:12:35,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:12:35,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:12:35,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:12:35,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:12:35,445 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:12:35,466 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:12:35,472 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:12:35,474 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:12:35,475 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:12:35,476 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2019-09-08 06:12:35,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/262ef4aaf/49087f902fc548149989b384bf317777/FLAGd1b034406 [2019-09-08 06:12:36,016 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:12:36,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2019-09-08 06:12:36,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/262ef4aaf/49087f902fc548149989b384bf317777/FLAGd1b034406 [2019-09-08 06:12:36,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/262ef4aaf/49087f902fc548149989b384bf317777 [2019-09-08 06:12:36,397 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:12:36,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:12:36,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:12:36,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:12:36,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:12:36,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:12:36" (1/1) ... [2019-09-08 06:12:36,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f8625e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:36, skipping insertion in model container [2019-09-08 06:12:36,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:12:36" (1/1) ... [2019-09-08 06:12:36,417 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:12:36,439 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:12:36,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:12:36,621 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:12:36,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:12:36,651 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:12:36,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:36 WrapperNode [2019-09-08 06:12:36,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:12:36,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:12:36,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:12:36,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:12:36,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:36" (1/1) ... [2019-09-08 06:12:36,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:36" (1/1) ... [2019-09-08 06:12:36,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:36" (1/1) ... [2019-09-08 06:12:36,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:36" (1/1) ... [2019-09-08 06:12:36,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:36" (1/1) ... [2019-09-08 06:12:36,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:36" (1/1) ... [2019-09-08 06:12:36,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:36" (1/1) ... [2019-09-08 06:12:36,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:12:36,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:12:36,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:12:36,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:12:36,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:36" (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 [2019-09-08 06:12:36,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:12:36,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:12:36,824 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-09-08 06:12:36,825 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:12:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:12:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:12:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-09-08 06:12:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:12:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:12:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:12:37,000 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:12:37,000 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:12:37,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:12:37 BoogieIcfgContainer [2019-09-08 06:12:37,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:12:37,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:12:37,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:12:37,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:12:37,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:12:36" (1/3) ... [2019-09-08 06:12:37,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33239624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:12:37, skipping insertion in model container [2019-09-08 06:12:37,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:36" (2/3) ... [2019-09-08 06:12:37,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33239624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:12:37, skipping insertion in model container [2019-09-08 06:12:37,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:12:37" (3/3) ... [2019-09-08 06:12:37,009 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2019-09-08 06:12:37,020 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:12:37,027 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:12:37,042 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:12:37,073 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:12:37,074 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:12:37,074 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:12:37,074 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:12:37,075 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:12:37,075 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:12:37,075 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:12:37,075 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:12:37,075 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:12:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-09-08 06:12:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:12:37,100 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:37,101 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:37,103 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:37,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2019-09-08 06:12:37,110 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:37,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:37,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:37,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:37,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:12:37,318 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:12:37,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-08 06:12:37,326 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:12:37,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:12:37,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:12:37,353 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2019-09-08 06:12:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:37,540 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-09-08 06:12:37,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 06:12:37,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-09-08 06:12:37,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:37,557 INFO L225 Difference]: With dead ends: 36 [2019-09-08 06:12:37,557 INFO L226 Difference]: Without dead ends: 22 [2019-09-08 06:12:37,562 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:12:37,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-08 06:12:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-08 06:12:37,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-08 06:12:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-09-08 06:12:37,613 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2019-09-08 06:12:37,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:37,614 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-09-08 06:12:37,614 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:12:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-09-08 06:12:37,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:12:37,617 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:37,618 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:37,618 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:37,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:37,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2019-09-08 06:12:37,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:37,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:37,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:37,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:37,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:12:37,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:37,752 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:12:37,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:37,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-08 06:12:37,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:12:37,889 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-08 06:12:37,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2019-09-08 06:12:37,890 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:12:37,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:12:37,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:12:37,891 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2019-09-08 06:12:37,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:37,990 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2019-09-08 06:12:37,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 06:12:37,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-09-08 06:12:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:37,992 INFO L225 Difference]: With dead ends: 39 [2019-09-08 06:12:37,993 INFO L226 Difference]: Without dead ends: 24 [2019-09-08 06:12:37,994 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:12:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-08 06:12:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-08 06:12:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-08 06:12:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-08 06:12:38,003 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2019-09-08 06:12:38,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:38,003 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-08 06:12:38,003 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:12:38,004 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-08 06:12:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-08 06:12:38,007 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:38,008 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:38,008 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:38,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:38,010 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2019-09-08 06:12:38,010 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:38,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:38,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:38,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:38,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:12:38,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:38,197 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:38,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:38,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 06:12:38,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:12:38,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:38,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-09-08 06:12:38,422 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:12:38,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:12:38,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:12:38,423 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 16 states. [2019-09-08 06:12:38,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:38,656 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2019-09-08 06:12:38,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:12:38,658 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2019-09-08 06:12:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:38,661 INFO L225 Difference]: With dead ends: 34 [2019-09-08 06:12:38,661 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:12:38,663 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:12:38,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:12:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-08 06:12:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-08 06:12:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2019-09-08 06:12:38,678 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2019-09-08 06:12:38,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:38,679 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2019-09-08 06:12:38,679 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:12:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2019-09-08 06:12:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-08 06:12:38,683 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:38,684 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:38,684 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:38,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:38,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2019-09-08 06:12:38,685 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:38,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:38,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:38,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:38,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-08 06:12:38,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:38,831 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:12:38,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:38,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:12:38,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:38,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-08 06:12:38,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-08 06:12:38,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:38,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2019-09-08 06:12:38,934 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:12:38,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:12:38,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:12:38,935 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 11 states. [2019-09-08 06:12:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:39,114 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2019-09-08 06:12:39,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:12:39,118 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2019-09-08 06:12:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:39,120 INFO L225 Difference]: With dead ends: 54 [2019-09-08 06:12:39,120 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 06:12:39,124 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:12:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 06:12:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-09-08 06:12:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-08 06:12:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2019-09-08 06:12:39,138 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 41 [2019-09-08 06:12:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:39,139 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2019-09-08 06:12:39,139 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:12:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2019-09-08 06:12:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-08 06:12:39,145 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:39,145 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:39,146 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:39,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 3 times [2019-09-08 06:12:39,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:39,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:39,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:39,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:39,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-08 06:12:39,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:39,333 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:39,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:12:39,377 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-08 06:12:39,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:39,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-08 06:12:39,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:12:39,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:39,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2019-09-08 06:12:39,569 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 06:12:39,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 06:12:39,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:12:39,570 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 20 states. [2019-09-08 06:12:39,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:39,895 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2019-09-08 06:12:39,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 06:12:39,897 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2019-09-08 06:12:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:39,899 INFO L225 Difference]: With dead ends: 42 [2019-09-08 06:12:39,899 INFO L226 Difference]: Without dead ends: 38 [2019-09-08 06:12:39,900 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:12:39,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-08 06:12:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2019-09-08 06:12:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 06:12:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2019-09-08 06:12:39,909 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 42 [2019-09-08 06:12:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:39,910 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2019-09-08 06:12:39,910 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 06:12:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2019-09-08 06:12:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-08 06:12:39,912 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:39,912 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:39,912 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:39,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1616597053, now seen corresponding path program 4 times [2019-09-08 06:12:39,913 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:39,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:39,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:39,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:39,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-08 06:12:39,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:39,970 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:39,980 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:12:39,996 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:12:39,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:39,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:12:40,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-08 06:12:40,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:40,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:12:40,018 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:12:40,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:12:40,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:12:40,020 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 7 states. [2019-09-08 06:12:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:40,189 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2019-09-08 06:12:40,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 06:12:40,190 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2019-09-08 06:12:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:40,191 INFO L225 Difference]: With dead ends: 60 [2019-09-08 06:12:40,191 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 06:12:40,192 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:12:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 06:12:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2019-09-08 06:12:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-08 06:12:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-09-08 06:12:40,199 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 56 [2019-09-08 06:12:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:40,200 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-09-08 06:12:40,200 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:12:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-09-08 06:12:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-08 06:12:40,201 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:40,201 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:40,202 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:40,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:40,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 5 times [2019-09-08 06:12:40,202 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:40,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:40,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:40,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:40,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-08 06:12:40,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:40,343 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:40,356 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:12:40,382 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-08 06:12:40,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:40,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-08 06:12:40,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:12:40,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:40,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2019-09-08 06:12:40,444 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:12:40,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:12:40,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:12:40,446 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 12 states. [2019-09-08 06:12:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:40,663 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2019-09-08 06:12:40,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:12:40,664 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2019-09-08 06:12:40,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:40,666 INFO L225 Difference]: With dead ends: 63 [2019-09-08 06:12:40,666 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:12:40,671 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:12:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:12:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 06:12:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:12:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-09-08 06:12:40,686 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 55 [2019-09-08 06:12:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:40,689 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-09-08 06:12:40,689 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:12:40,689 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-09-08 06:12:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-08 06:12:40,691 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:40,691 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:40,691 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1611334083, now seen corresponding path program 6 times [2019-09-08 06:12:40,692 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:40,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:40,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:40,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:40,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 121 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2019-09-08 06:12:40,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:40,887 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:40,898 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:12:40,932 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-09-08 06:12:40,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:40,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-08 06:12:40,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 106 proven. 53 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2019-09-08 06:12:41,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:41,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 28 [2019-09-08 06:12:41,250 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-08 06:12:41,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-08 06:12:41,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:12:41,251 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 28 states. [2019-09-08 06:12:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:42,310 INFO L93 Difference]: Finished difference Result 89 states and 125 transitions. [2019-09-08 06:12:42,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-08 06:12:42,310 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 83 [2019-09-08 06:12:42,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:42,313 INFO L225 Difference]: With dead ends: 89 [2019-09-08 06:12:42,313 INFO L226 Difference]: Without dead ends: 55 [2019-09-08 06:12:42,315 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=492, Invalid=2264, Unknown=0, NotChecked=0, Total=2756 [2019-09-08 06:12:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-08 06:12:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2019-09-08 06:12:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 06:12:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2019-09-08 06:12:42,326 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 83 [2019-09-08 06:12:42,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:42,326 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2019-09-08 06:12:42,326 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-08 06:12:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2019-09-08 06:12:42,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-08 06:12:42,328 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:42,328 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:42,328 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:42,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:42,329 INFO L82 PathProgramCache]: Analyzing trace with hash -865837754, now seen corresponding path program 7 times [2019-09-08 06:12:42,329 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:42,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:42,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:42,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:42,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-09-08 06:12:42,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:42,496 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:42,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:42,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-08 06:12:42,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 25 proven. 92 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-09-08 06:12:42,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:42,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2019-09-08 06:12:42,913 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-08 06:12:42,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-08 06:12:42,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2019-09-08 06:12:42,914 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 29 states. [2019-09-08 06:12:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:43,714 INFO L93 Difference]: Finished difference Result 68 states and 99 transitions. [2019-09-08 06:12:43,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:12:43,715 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 69 [2019-09-08 06:12:43,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:43,716 INFO L225 Difference]: With dead ends: 68 [2019-09-08 06:12:43,716 INFO L226 Difference]: Without dead ends: 0 [2019-09-08 06:12:43,718 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=358, Invalid=2294, Unknown=0, NotChecked=0, Total=2652 [2019-09-08 06:12:43,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-08 06:12:43,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-08 06:12:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-08 06:12:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-08 06:12:43,718 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2019-09-08 06:12:43,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:43,719 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-08 06:12:43,719 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-08 06:12:43,719 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-08 06:12:43,719 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-08 06:12:43,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-08 06:12:44,013 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2019-09-08 06:12:44,017 INFO L443 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2019-09-08 06:12:44,017 INFO L446 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2019-09-08 06:12:44,017 INFO L439 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (not (<= |fibonacci_#in~n| 1)) (<= fibonacci_~n |fibonacci_#in~n|)) [2019-09-08 06:12:44,018 INFO L443 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2019-09-08 06:12:44,018 INFO L439 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (let ((.cse0 (<= |fibonacci_#in~n| fibonacci_~n))) (or (and .cse0 (<= 1 |fibonacci_#t~ret0|) (<= fibonacci_~n 3)) (and .cse0 (<= 2 |fibonacci_#t~ret0|)))) (<= 2 fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) [2019-09-08 06:12:44,018 INFO L443 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2019-09-08 06:12:44,018 INFO L443 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2019-09-08 06:12:44,018 INFO L443 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2019-09-08 06:12:44,018 INFO L443 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2019-09-08 06:12:44,018 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-08 06:12:44,018 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:12:44,019 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:12:44,019 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-08 06:12:44,019 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-08 06:12:44,019 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-08 06:12:44,019 INFO L443 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2019-09-08 06:12:44,019 INFO L446 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2019-09-08 06:12:44,020 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2019-09-08 06:12:44,021 INFO L443 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2019-09-08 06:12:44,021 INFO L443 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2019-09-08 06:12:44,021 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2019-09-08 06:12:44,021 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2019-09-08 06:12:44,022 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2019-09-08 06:12:44,022 INFO L443 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2019-09-08 06:12:44,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:12:44 BoogieIcfgContainer [2019-09-08 06:12:44,028 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:12:44,031 INFO L168 Benchmark]: Toolchain (without parser) took 7630.33 ms. Allocated memory was 134.7 MB in the beginning and 323.0 MB in the end (delta: 188.2 MB). Free memory was 90.4 MB in the beginning and 268.9 MB in the end (delta: -178.5 MB). Peak memory consumption was 166.4 MB. Max. memory is 7.1 GB. [2019-09-08 06:12:44,032 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 134.7 MB. Free memory was 109.1 MB in the beginning and 108.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 06:12:44,035 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.73 ms. Allocated memory is still 134.7 MB. Free memory was 90.2 MB in the beginning and 81.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2019-09-08 06:12:44,042 INFO L168 Benchmark]: Boogie Preprocessor took 122.18 ms. Allocated memory was 134.7 MB in the beginning and 201.3 MB in the end (delta: 66.6 MB). Free memory was 81.0 MB in the beginning and 178.1 MB in the end (delta: -97.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-09-08 06:12:44,043 INFO L168 Benchmark]: RCFGBuilder took 226.91 ms. Allocated memory is still 201.3 MB. Free memory was 178.1 MB in the beginning and 166.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-09-08 06:12:44,045 INFO L168 Benchmark]: TraceAbstraction took 7025.15 ms. Allocated memory was 201.3 MB in the beginning and 323.0 MB in the end (delta: 121.6 MB). Free memory was 166.6 MB in the beginning and 268.9 MB in the end (delta: -102.4 MB). Peak memory consumption was 175.9 MB. Max. memory is 7.1 GB. [2019-09-08 06:12:44,054 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 134.7 MB. Free memory was 109.1 MB in the beginning and 108.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.73 ms. Allocated memory is still 134.7 MB. Free memory was 90.2 MB in the beginning and 81.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.18 ms. Allocated memory was 134.7 MB in the beginning and 201.3 MB in the end (delta: 66.6 MB). Free memory was 81.0 MB in the beginning and 178.1 MB in the end (delta: -97.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 226.91 ms. Allocated memory is still 201.3 MB. Free memory was 178.1 MB in the beginning and 166.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7025.15 ms. Allocated memory was 201.3 MB in the beginning and 323.0 MB in the end (delta: 121.6 MB). Free memory was 166.6 MB in the beginning and 268.9 MB in the end (delta: -102.4 MB). Peak memory consumption was 175.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 6.9s OverallTime, 9 OverallIterations, 11 TraceHistogramMax, 3.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 205 SDslu, 932 SDs, 0 SdLazy, 1643 SolverSat, 286 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 592 GetRequests, 389 SyntacticMatches, 4 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 77 PreInvPairs, 104 NumberOfFragments, 43 HoareAnnotationTreeSize, 77 FomulaSimplifications, 320 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 255 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 816 NumberOfCodeBlocks, 767 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 799 ConstructedInterpolants, 0 QuantifiedInterpolants, 108523 SizeOfPredicates, 31 NumberOfNonLiveVariables, 798 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 1096/1648 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...