/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/Problem03_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:41:18,647 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:41:18,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:41:18,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:41:18,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:41:18,730 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 01:41:18,750 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:41:18,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:41:18,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:41:18,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:41:18,752 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:41:18,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:41:18,753 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:41:18,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:41:18,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:41:18,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:41:18,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:41:18,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:41:18,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:41:18,757 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:41:18,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:41:18,757 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:41:18,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:41:18,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:41:18,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:41:18,758 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:41:18,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:41:18,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:41:18,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:41:18,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:41:18,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:41:18,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:41:18,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:41:18,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:41:18,761 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 01:41:19,074 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:41:19,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:41:19,096 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:41:19,097 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:41:19,098 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:41:19,099 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label08.c [2019-11-07 01:41:19,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f02fc4a48/8f41fffa5d7e4e918dae03ffedaf46ad/FLAG2fc4adb43 [2019-11-07 01:41:19,839 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:41:19,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label08.c [2019-11-07 01:41:19,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f02fc4a48/8f41fffa5d7e4e918dae03ffedaf46ad/FLAG2fc4adb43 [2019-11-07 01:41:20,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f02fc4a48/8f41fffa5d7e4e918dae03ffedaf46ad [2019-11-07 01:41:20,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:41:20,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:41:20,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:41:20,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:41:20,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:41:20,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:20" (1/1) ... [2019-11-07 01:41:20,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ce2aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:20, skipping insertion in model container [2019-11-07 01:41:20,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:20" (1/1) ... [2019-11-07 01:41:20,116 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:41:20,200 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:41:20,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:41:20,982 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:41:21,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:41:21,313 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:41:21,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:21 WrapperNode [2019-11-07 01:41:21,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:41:21,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:41:21,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:41:21,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:41:21,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:21" (1/1) ... [2019-11-07 01:41:21,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:21" (1/1) ... [2019-11-07 01:41:21,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:21" (1/1) ... [2019-11-07 01:41:21,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:21" (1/1) ... [2019-11-07 01:41:21,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:21" (1/1) ... [2019-11-07 01:41:21,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:21" (1/1) ... [2019-11-07 01:41:21,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:21" (1/1) ... [2019-11-07 01:41:21,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:41:21,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:41:21,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:41:21,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:41:21,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:41:21,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:41:21,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:41:21,589 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:41:21,589 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:41:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:41:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:41:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:41:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:41:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:41:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:41:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:41:24,535 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:41:24,535 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:41:24,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:24 BoogieIcfgContainer [2019-11-07 01:41:24,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:41:24,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:41:24,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:41:24,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:41:24,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:41:20" (1/3) ... [2019-11-07 01:41:24,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be2a9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:24, skipping insertion in model container [2019-11-07 01:41:24,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:21" (2/3) ... [2019-11-07 01:41:24,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be2a9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:24, skipping insertion in model container [2019-11-07 01:41:24,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:24" (3/3) ... [2019-11-07 01:41:24,545 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label08.c [2019-11-07 01:41:24,554 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:41:24,562 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:41:24,574 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:41:24,600 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:41:24,600 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:41:24,601 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:41:24,601 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:41:24,601 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:41:24,601 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:41:24,601 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:41:24,601 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:41:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-11-07 01:41:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 01:41:24,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:24,639 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:24,641 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash 136467238, now seen corresponding path program 1 times [2019-11-07 01:41:24,657 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:24,658 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618061861] [2019-11-07 01:41:24,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:25,447 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 01:41:25,448 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618061861] [2019-11-07 01:41:25,450 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:25,450 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:25,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946582676] [2019-11-07 01:41:25,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:25,461 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:25,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:25,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:25,481 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-11-07 01:41:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:26,644 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-11-07 01:41:26,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:26,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-11-07 01:41:26,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:26,663 INFO L225 Difference]: With dead ends: 462 [2019-11-07 01:41:26,663 INFO L226 Difference]: Without dead ends: 301 [2019-11-07 01:41:26,668 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 01:41:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-11-07 01:41:26,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-11-07 01:41:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-11-07 01:41:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2019-11-07 01:41:26,752 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2019-11-07 01:41:26,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:26,753 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2019-11-07 01:41:26,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2019-11-07 01:41:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-07 01:41:26,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:26,762 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:26,762 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:26,764 INFO L82 PathProgramCache]: Analyzing trace with hash 558837181, now seen corresponding path program 1 times [2019-11-07 01:41:26,765 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:26,765 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070541452] [2019-11-07 01:41:26,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:26,943 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070541452] [2019-11-07 01:41:26,943 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:26,943 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:41:26,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372524853] [2019-11-07 01:41:26,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:41:26,946 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:26,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:41:26,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:41:26,946 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand 6 states. [2019-11-07 01:41:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:28,275 INFO L93 Difference]: Finished difference Result 929 states and 1794 transitions. [2019-11-07 01:41:28,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:41:28,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2019-11-07 01:41:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:28,285 INFO L225 Difference]: With dead ends: 929 [2019-11-07 01:41:28,285 INFO L226 Difference]: Without dead ends: 633 [2019-11-07 01:41:28,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 01:41:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-11-07 01:41:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 603. [2019-11-07 01:41:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-07 01:41:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1113 transitions. [2019-11-07 01:41:28,359 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1113 transitions. Word has length 158 [2019-11-07 01:41:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:28,360 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1113 transitions. [2019-11-07 01:41:28,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:41:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1113 transitions. [2019-11-07 01:41:28,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 01:41:28,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:28,374 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:28,374 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:28,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1532434670, now seen corresponding path program 1 times [2019-11-07 01:41:28,375 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:28,375 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493997052] [2019-11-07 01:41:28,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:28,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493997052] [2019-11-07 01:41:28,584 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:28,584 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:28,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432333737] [2019-11-07 01:41:28,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:28,586 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:28,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:28,586 INFO L87 Difference]: Start difference. First operand 603 states and 1113 transitions. Second operand 3 states. [2019-11-07 01:41:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:29,609 INFO L93 Difference]: Finished difference Result 1793 states and 3387 transitions. [2019-11-07 01:41:29,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:29,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-11-07 01:41:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:29,634 INFO L225 Difference]: With dead ends: 1793 [2019-11-07 01:41:29,635 INFO L226 Difference]: Without dead ends: 1195 [2019-11-07 01:41:29,641 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 01:41:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2019-11-07 01:41:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1195. [2019-11-07 01:41:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2019-11-07 01:41:29,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 2172 transitions. [2019-11-07 01:41:29,731 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 2172 transitions. Word has length 161 [2019-11-07 01:41:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:29,743 INFO L462 AbstractCegarLoop]: Abstraction has 1195 states and 2172 transitions. [2019-11-07 01:41:29,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 2172 transitions. [2019-11-07 01:41:29,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-07 01:41:29,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:29,758 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:29,759 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:29,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:29,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1729527359, now seen corresponding path program 1 times [2019-11-07 01:41:29,759 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:29,760 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88994348] [2019-11-07 01:41:29,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:29,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88994348] [2019-11-07 01:41:29,908 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852183036] [2019-11-07 01:41:29,908 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 01:41:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:30,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:41:30,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 01:41:30,258 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 01:41:30,440 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:41:30,440 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-07 01:41:30,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419606076] [2019-11-07 01:41:30,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:30,444 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:30,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:30,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:41:30,445 INFO L87 Difference]: Start difference. First operand 1195 states and 2172 transitions. Second operand 3 states. [2019-11-07 01:41:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:31,503 INFO L93 Difference]: Finished difference Result 3571 states and 6683 transitions. [2019-11-07 01:41:31,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:31,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2019-11-07 01:41:31,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:31,524 INFO L225 Difference]: With dead ends: 3571 [2019-11-07 01:41:31,524 INFO L226 Difference]: Without dead ends: 2381 [2019-11-07 01:41:31,528 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:41:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2019-11-07 01:41:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2019-11-07 01:41:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2381 states. [2019-11-07 01:41:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4354 transitions. [2019-11-07 01:41:31,632 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4354 transitions. Word has length 178 [2019-11-07 01:41:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:31,632 INFO L462 AbstractCegarLoop]: Abstraction has 2381 states and 4354 transitions. [2019-11-07 01:41:31,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4354 transitions. [2019-11-07 01:41:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-07 01:41:31,643 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:31,643 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:31,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:31,851 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:31,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1513048515, now seen corresponding path program 1 times [2019-11-07 01:41:31,852 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:31,852 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353591358] [2019-11-07 01:41:31,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:32,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353591358] [2019-11-07 01:41:32,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578168509] [2019-11-07 01:41:32,045 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 01:41:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:32,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 01:41:32,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:41:32,560 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:41:32,631 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:41:32,632 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:41:32,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401912971] [2019-11-07 01:41:32,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:41:32,633 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:32,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:41:32,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:41:32,635 INFO L87 Difference]: Start difference. First operand 2381 states and 4354 transitions. Second operand 5 states. [2019-11-07 01:41:33,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:33,925 INFO L93 Difference]: Finished difference Result 6055 states and 11499 transitions. [2019-11-07 01:41:33,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:41:33,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2019-11-07 01:41:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:33,953 INFO L225 Difference]: With dead ends: 6055 [2019-11-07 01:41:33,953 INFO L226 Difference]: Without dead ends: 3679 [2019-11-07 01:41:33,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-07 01:41:33,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2019-11-07 01:41:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 3641. [2019-11-07 01:41:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3641 states. [2019-11-07 01:41:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 6742 transitions. [2019-11-07 01:41:34,091 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 6742 transitions. Word has length 199 [2019-11-07 01:41:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:34,091 INFO L462 AbstractCegarLoop]: Abstraction has 3641 states and 6742 transitions. [2019-11-07 01:41:34,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:41:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 6742 transitions. [2019-11-07 01:41:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-11-07 01:41:34,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:34,105 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:34,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:34,310 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1312405658, now seen corresponding path program 1 times [2019-11-07 01:41:34,310 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:34,310 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126488095] [2019-11-07 01:41:34,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:41:34,455 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126488095] [2019-11-07 01:41:34,456 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157473416] [2019-11-07 01:41:34,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:34,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:41:34,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:41:34,745 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:41:34,835 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:41:34,835 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-07 01:41:34,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938061704] [2019-11-07 01:41:34,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:41:34,836 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:34,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:41:34,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-11-07 01:41:34,837 INFO L87 Difference]: Start difference. First operand 3641 states and 6742 transitions. Second operand 5 states. [2019-11-07 01:41:36,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:36,152 INFO L93 Difference]: Finished difference Result 10626 states and 21377 transitions. [2019-11-07 01:41:36,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:41:36,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 200 [2019-11-07 01:41:36,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:36,204 INFO L225 Difference]: With dead ends: 10626 [2019-11-07 01:41:36,206 INFO L226 Difference]: Without dead ends: 6990 [2019-11-07 01:41:36,220 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 395 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-07 01:41:36,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6990 states. [2019-11-07 01:41:36,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6990 to 6892. [2019-11-07 01:41:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6892 states. [2019-11-07 01:41:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6892 states to 6892 states and 12420 transitions. [2019-11-07 01:41:36,488 INFO L78 Accepts]: Start accepts. Automaton has 6892 states and 12420 transitions. Word has length 200 [2019-11-07 01:41:36,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:36,489 INFO L462 AbstractCegarLoop]: Abstraction has 6892 states and 12420 transitions. [2019-11-07 01:41:36,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:41:36,489 INFO L276 IsEmpty]: Start isEmpty. Operand 6892 states and 12420 transitions. [2019-11-07 01:41:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-11-07 01:41:36,511 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:36,512 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:36,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:36,721 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:36,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:36,722 INFO L82 PathProgramCache]: Analyzing trace with hash 796891807, now seen corresponding path program 1 times [2019-11-07 01:41:36,722 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:36,723 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711339437] [2019-11-07 01:41:36,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:36,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711339437] [2019-11-07 01:41:36,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588340478] [2019-11-07 01:41:36,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:37,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:41:37,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:41:37,235 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:37,403 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2019-11-07 01:41:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:41:37,451 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [156130566] [2019-11-07 01:41:37,492 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-11-07 01:41:37,492 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:41:37,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:41:37,510 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:41:37,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:41:37,920 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2019-11-07 01:41:39,024 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2019-11-07 01:41:39,323 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-11-07 01:41:39,619 WARN L191 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2019-11-07 01:41:39,790 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2019-11-07 01:41:40,057 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 210 [2019-11-07 01:41:40,486 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-11-07 01:41:40,597 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-11-07 01:41:40,866 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 364 [2019-11-07 01:41:41,007 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-11-07 01:41:41,302 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 364 [2019-11-07 01:41:41,532 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 374 [2019-11-07 01:41:41,998 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 374 [2019-11-07 01:41:42,255 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 162 for LOIs [2019-11-07 01:41:50,636 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2019-11-07 01:41:50,710 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2019-11-07 01:41:50,809 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 15