/usr/bin/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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:37:54,546 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:37:54,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:37:54,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:37:54,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:37:54,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:37:54,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:37:54,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:37:54,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:37:54,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:37:54,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:37:54,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:37:54,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:37:54,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:37:54,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:37:54,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:37:54,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:37:54,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:37:54,629 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 [2019-11-07 01:37:54,643 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:37:54,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:37:54,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:37:54,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:37:54,645 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:37:54,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:37:54,645 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:37:54,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:37:54,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:37:54,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:37:54,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:37:54,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:37:54,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:37:54,647 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:37:54,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:37:54,647 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:37:54,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:37:54,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:37:54,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:37:54,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:37:54,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:37:54,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:37:54,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:37:54,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:37:54,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:37:54,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:37:54,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:37:54,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:37:54,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:37:54,932 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:37:54,945 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:37:54,948 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:37:54,950 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:37:54,950 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:37:54,951 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label13.c [2019-11-07 01:37:55,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b8e359f0/e6bac3a4234141bc8a6f3a2c026f4980/FLAGcb0bc8971 [2019-11-07 01:37:55,565 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:37:55,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label13.c [2019-11-07 01:37:55,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b8e359f0/e6bac3a4234141bc8a6f3a2c026f4980/FLAGcb0bc8971 [2019-11-07 01:37:55,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b8e359f0/e6bac3a4234141bc8a6f3a2c026f4980 [2019-11-07 01:37:55,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:37:55,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:37:55,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:37:55,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:37:55,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:37:55,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:55" (1/1) ... [2019-11-07 01:37:55,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d482f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:55, skipping insertion in model container [2019-11-07 01:37:55,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:55" (1/1) ... [2019-11-07 01:37:55,899 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:37:55,953 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:37:56,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:37:56,443 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:37:56,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:37:56,553 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:37:56,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:56 WrapperNode [2019-11-07 01:37:56,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:37:56,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:37:56,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:37:56,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:37:56,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:56" (1/1) ... [2019-11-07 01:37:56,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:56" (1/1) ... [2019-11-07 01:37:56,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:56" (1/1) ... [2019-11-07 01:37:56,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:56" (1/1) ... [2019-11-07 01:37:56,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:56" (1/1) ... [2019-11-07 01:37:56,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:56" (1/1) ... [2019-11-07 01:37:56,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:56" (1/1) ... [2019-11-07 01:37:56,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:37:56,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:37:56,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:37:56,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:37:56,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:56" (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 [2019-11-07 01:37:56,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:37:56,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:37:56,709 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:37:56,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:37:56,710 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:37:56,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:37:56,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:37:56,711 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:37:56,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:37:56,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:37:56,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:37:58,611 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:37:58,611 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:37:58,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:58 BoogieIcfgContainer [2019-11-07 01:37:58,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:37:58,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:37:58,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:37:58,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:37:58,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:37:55" (1/3) ... [2019-11-07 01:37:58,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec5a28a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:58, skipping insertion in model container [2019-11-07 01:37:58,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:56" (2/3) ... [2019-11-07 01:37:58,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec5a28a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:58, skipping insertion in model container [2019-11-07 01:37:58,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:58" (3/3) ... [2019-11-07 01:37:58,623 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label13.c [2019-11-07 01:37:58,633 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:37:58,642 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:37:58,653 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:37:58,678 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:37:58,678 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:37:58,678 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:37:58,678 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:37:58,679 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:37:58,679 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:37:58,679 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:37:58,679 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:37:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:37:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:37:58,707 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:37:58,708 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:37:58,710 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:37:58,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:37:58,715 INFO L82 PathProgramCache]: Analyzing trace with hash -219369161, now seen corresponding path program 1 times [2019-11-07 01:37:58,724 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:37:58,724 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552030645] [2019-11-07 01:37:58,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:37:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:37:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:37:59,114 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552030645] [2019-11-07 01:37:59,115 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:37:59,116 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:37:59,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359498727] [2019-11-07 01:37:59,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:37:59,128 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:37:59,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:37:59,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:37:59,145 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:37:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:37:59,692 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:37:59,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:37:59,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:37:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:37:59,711 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:37:59,711 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:37:59,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:37:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:37:59,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:37:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:37:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-11-07 01:37:59,826 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-11-07 01:37:59,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:37:59,828 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-11-07 01:37:59,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:37:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-11-07 01:37:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 01:37:59,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:37:59,874 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:37:59,874 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:37:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:37:59,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1874064498, now seen corresponding path program 1 times [2019-11-07 01:37:59,875 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:37:59,875 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627152326] [2019-11-07 01:37:59,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:37:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:00,027 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627152326] [2019-11-07 01:38:00,027 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:00,027 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:38:00,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097832818] [2019-11-07 01:38:00,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:38:00,030 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:00,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:38:00,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:38:00,031 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-11-07 01:38:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:00,411 INFO L93 Difference]: Finished difference Result 351 states and 663 transitions. [2019-11-07 01:38:00,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:38:00,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-11-07 01:38:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:00,419 INFO L225 Difference]: With dead ends: 351 [2019-11-07 01:38:00,419 INFO L226 Difference]: Without dead ends: 181 [2019-11-07 01:38:00,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:38:00,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-07 01:38:00,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2019-11-07 01:38:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-07 01:38:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 299 transitions. [2019-11-07 01:38:00,447 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 299 transitions. Word has length 101 [2019-11-07 01:38:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:00,447 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 299 transitions. [2019-11-07 01:38:00,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:38:00,448 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 299 transitions. [2019-11-07 01:38:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-07 01:38:00,450 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:00,450 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:38:00,450 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:00,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:00,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1307307617, now seen corresponding path program 1 times [2019-11-07 01:38:00,451 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:00,451 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213974491] [2019-11-07 01:38:00,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:00,602 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213974491] [2019-11-07 01:38:00,603 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:00,603 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:38:00,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840631538] [2019-11-07 01:38:00,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:38:00,607 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:00,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:38:00,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:38:00,608 INFO L87 Difference]: Start difference. First operand 177 states and 299 transitions. Second operand 6 states. [2019-11-07 01:38:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:01,189 INFO L93 Difference]: Finished difference Result 453 states and 784 transitions. [2019-11-07 01:38:01,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:38:01,191 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-11-07 01:38:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:01,194 INFO L225 Difference]: With dead ends: 453 [2019-11-07 01:38:01,195 INFO L226 Difference]: Without dead ends: 281 [2019-11-07 01:38:01,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:38:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-11-07 01:38:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 267. [2019-11-07 01:38:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2019-11-07 01:38:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 433 transitions. [2019-11-07 01:38:01,219 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 433 transitions. Word has length 108 [2019-11-07 01:38:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:01,220 INFO L462 AbstractCegarLoop]: Abstraction has 267 states and 433 transitions. [2019-11-07 01:38:01,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:38:01,220 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 433 transitions. [2019-11-07 01:38:01,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-07 01:38:01,223 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:01,223 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:38:01,224 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:01,224 INFO L82 PathProgramCache]: Analyzing trace with hash -852396249, now seen corresponding path program 1 times [2019-11-07 01:38:01,224 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:01,225 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193481230] [2019-11-07 01:38:01,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:01,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193481230] [2019-11-07 01:38:01,316 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:38:01,316 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:38:01,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993357071] [2019-11-07 01:38:01,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:38:01,317 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:01,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:38:01,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:38:01,318 INFO L87 Difference]: Start difference. First operand 267 states and 433 transitions. Second operand 3 states. [2019-11-07 01:38:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:01,739 INFO L93 Difference]: Finished difference Result 703 states and 1156 transitions. [2019-11-07 01:38:01,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:38:01,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2019-11-07 01:38:01,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:01,744 INFO L225 Difference]: With dead ends: 703 [2019-11-07 01:38:01,745 INFO L226 Difference]: Without dead ends: 441 [2019-11-07 01:38:01,749 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:38:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2019-11-07 01:38:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2019-11-07 01:38:01,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-11-07 01:38:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 643 transitions. [2019-11-07 01:38:01,810 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 643 transitions. Word has length 112 [2019-11-07 01:38:01,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:01,812 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 643 transitions. [2019-11-07 01:38:01,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:38:01,812 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 643 transitions. [2019-11-07 01:38:01,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-07 01:38:01,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:01,822 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:38:01,826 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:01,826 INFO L82 PathProgramCache]: Analyzing trace with hash 5336562, now seen corresponding path program 1 times [2019-11-07 01:38:01,827 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:01,827 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289800328] [2019-11-07 01:38:01,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:38:02,024 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289800328] [2019-11-07 01:38:02,025 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948974465] [2019-11-07 01:38:02,025 INFO L94 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 [2019-11-07 01:38:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:02,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:38:02,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:38:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:38:02,240 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:38:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:38:02,322 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:38:02,323 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-11-07 01:38:02,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896458830] [2019-11-07 01:38:02,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:38:02,324 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:02,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:38:02,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:38:02,327 INFO L87 Difference]: Start difference. First operand 441 states and 643 transitions. Second operand 3 states. [2019-11-07 01:38:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:38:02,705 INFO L93 Difference]: Finished difference Result 1217 states and 1814 transitions. [2019-11-07 01:38:02,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:38:02,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-11-07 01:38:02,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:38:02,710 INFO L225 Difference]: With dead ends: 1217 [2019-11-07 01:38:02,710 INFO L226 Difference]: Without dead ends: 609 [2019-11-07 01:38:02,712 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:38:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-11-07 01:38:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2019-11-07 01:38:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2019-11-07 01:38:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 760 transitions. [2019-11-07 01:38:02,738 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 760 transitions. Word has length 121 [2019-11-07 01:38:02,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:38:02,738 INFO L462 AbstractCegarLoop]: Abstraction has 609 states and 760 transitions. [2019-11-07 01:38:02,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:38:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 760 transitions. [2019-11-07 01:38:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-07 01:38:02,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:38:02,742 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:38:02,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:38:02,947 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:38:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:38:02,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1090347318, now seen corresponding path program 1 times [2019-11-07 01:38:02,947 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:38:02,948 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34077619] [2019-11-07 01:38:02,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:38:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 01:38:03,077 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34077619] [2019-11-07 01:38:03,077 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193463047] [2019-11-07 01:38:03,078 INFO L94 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 [2019-11-07 01:38:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:38:03,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:38:03,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:38:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:38:03,286 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:38:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:38:03,400 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [569152176] [2019-11-07 01:38:03,446 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:38:03,446 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:38:03,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:38:03,470 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:38:03,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:38:03,630 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:38:04,808 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 82 for LOIs [2019-11-07 01:38:06,142 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 01:38:06,158 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 01:38:06,195 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 01:38:06,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:38:06,754 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:38:06,942 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2019-11-07 01:38:07,448 WARN L191 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:38:08,136 WARN L191 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 86 [2019-11-07 01:38:08,542 WARN L191 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 76 [2019-11-07 01:38:08,793 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2019-11-07 01:38:09,013 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2019-11-07 01:38:09,253 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2019-11-07 01:38:09,599 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2019-11-07 01:38:09,988 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2019-11-07 01:38:10,279 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2019-11-07 01:38:10,601 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-11-07 01:38:10,935 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:38:11,244 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2019-11-07 01:38:11,593 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2019-11-07 01:38:11,933 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2019-11-07 01:38:12,202 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2019-11-07 01:38:12,567 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2019-11-07 01:38:12,889 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:38:13,234 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2019-11-07 01:38:13,552 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2019-11-07 01:38:13,890 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:38:14,185 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2019-11-07 01:38:14,510 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2019-11-07 01:38:14,816 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2019-11-07 01:38:15,094 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2019-11-07 01:38:15,454 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2019-11-07 01:38:15,786 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2019-11-07 01:38:16,105 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2019-11-07 01:38:16,434 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2019-11-07 01:38:16,791 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2019-11-07 01:38:17,175 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2019-11-07 01:38:17,577 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2019-11-07 01:38:17,916 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2019-11-07 01:38:18,239 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2019-11-07 01:38:18,571 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2019-11-07 01:38:18,944 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2019-11-07 01:38:19,352 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2019-11-07 01:38:19,725 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2019-11-07 01:38:20,095 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2019-11-07 01:38:20,530 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2019-11-07 01:38:20,920 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2019-11-07 01:38:20,961 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:38:20,961 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 44] total 56 [2019-11-07 01:38:20,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565772313] [2019-11-07 01:38:20,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-07 01:38:20,963 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:38:20,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-07 01:38:20,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2835, Unknown=0, NotChecked=0, Total=3080 [2019-11-07 01:38:20,965 INFO L87 Difference]: Start difference. First operand 609 states and 760 transitions. Second operand 56 states. [2019-11-07 01:38:21,186 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:38:21,551 WARN L191 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2019-11-07 01:38:21,938 WARN L191 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 97 [2019-11-07 01:38:22,451 WARN L191 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 95 [2019-11-07 01:38:22,766 WARN L191 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2019-11-07 01:38:23,496 WARN L191 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 93 [2019-11-07 01:38:24,004 WARN L191 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 102 [2019-11-07 01:38:24,340 WARN L191 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 75 [2019-11-07 01:38:24,648 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 71 [2019-11-07 01:38:24,784 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2019-11-07 01:38:24,966 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-11-07 01:38:25,499 WARN L191 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 92 [2019-11-07 01:38:26,043 WARN L191 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 103 [2019-11-07 01:38:26,812 WARN L191 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 109 [2019-11-07 01:38:27,482 WARN L191 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 115 [2019-11-07 01:38:28,201 WARN L191 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 122 [2019-11-07 01:38:29,017 WARN L191 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 125 [2019-11-07 01:38:29,859 WARN L191 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 129 [2019-11-07 01:38:31,024 WARN L191 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 138 DAG size of output: 128 [2019-11-07 01:38:31,674 WARN L191 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 95 [2019-11-07 01:38:32,069 WARN L191 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 90 [2019-11-07 01:38:32,858 WARN L191 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 130 [2019-11-07 01:38:33,390 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 73 [2019-11-07 01:38:34,246 WARN L191 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 131 [2019-11-07 01:38:34,566 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2019-11-07 01:38:35,589 WARN L191 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 133 [2019-11-07 01:38:35,841 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:38:36,098 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-11-07 01:38:36,438 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 108