/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:37:25,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:37:25,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:37:25,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:37:25,731 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 [2019-11-06 22:37:25,750 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:37:25,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:37:25,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:37:25,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:37:25,752 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:37:25,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:37:25,753 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:37:25,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:37:25,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:37:25,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:37:25,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:37:25,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:37:25,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:37:25,754 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:37:25,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:37:25,755 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:37:25,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:37:25,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:37:25,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:37:25,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:37:25,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:37:25,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:37:25,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:37:25,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:37:25,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:37:25,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:37:25,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:37:25,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:37:25,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:37:26,062 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:37:26,076 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:37:26,080 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:37:26,082 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:37:26,082 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:37:26,083 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label59.c [2019-11-06 22:37:26,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2ce98267/b97456f7ed1245b2b93ad16e983250c4/FLAGf7db59149 [2019-11-06 22:37:26,691 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:37:26,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label59.c [2019-11-06 22:37:26,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2ce98267/b97456f7ed1245b2b93ad16e983250c4/FLAGf7db59149 [2019-11-06 22:37:27,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2ce98267/b97456f7ed1245b2b93ad16e983250c4 [2019-11-06 22:37:27,019 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:37:27,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:37:27,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:37:27,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:37:27,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:37:27,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:27" (1/1) ... [2019-11-06 22:37:27,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716597c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:27, skipping insertion in model container [2019-11-06 22:37:27,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:27" (1/1) ... [2019-11-06 22:37:27,036 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:37:27,094 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:37:27,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:37:27,594 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:37:27,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:37:27,762 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:37:27,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:27 WrapperNode [2019-11-06 22:37:27,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:37:27,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:37:27,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:37:27,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:37:27,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:27" (1/1) ... [2019-11-06 22:37:27,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:27" (1/1) ... [2019-11-06 22:37:27,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:27" (1/1) ... [2019-11-06 22:37:27,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:27" (1/1) ... [2019-11-06 22:37:27,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:27" (1/1) ... [2019-11-06 22:37:27,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:27" (1/1) ... [2019-11-06 22:37:27,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:27" (1/1) ... [2019-11-06 22:37:27,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:37:27,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:37:27,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:37:27,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:37:27,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:27" (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 [2019-11-06 22:37:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:37:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:37:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:37:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:37:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:37:27,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:37:27,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:37:27,945 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:37:27,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:37:27,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:37:27,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:37:29,160 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:37:29,161 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:37:29,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:29 BoogieIcfgContainer [2019-11-06 22:37:29,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:37:29,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:37:29,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:37:29,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:37:29,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:37:27" (1/3) ... [2019-11-06 22:37:29,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4a0f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:29, skipping insertion in model container [2019-11-06 22:37:29,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:27" (2/3) ... [2019-11-06 22:37:29,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4a0f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:29, skipping insertion in model container [2019-11-06 22:37:29,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:29" (3/3) ... [2019-11-06 22:37:29,170 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label59.c [2019-11-06 22:37:29,180 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:37:29,189 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:37:29,205 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:37:29,240 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:37:29,240 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:37:29,240 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:37:29,240 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:37:29,241 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:37:29,241 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:37:29,241 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:37:29,241 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:37:29,266 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:37:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 22:37:29,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:29,280 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] [2019-11-06 22:37:29,282 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:29,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1246520719, now seen corresponding path program 1 times [2019-11-06 22:37:29,305 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:29,305 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75894754] [2019-11-06 22:37:29,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:29,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75894754] [2019-11-06 22:37:29,694 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:29,695 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:37:29,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690585771] [2019-11-06 22:37:29,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:37:29,703 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:29,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:37:29,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:29,721 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:37:30,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:30,709 INFO L93 Difference]: Finished difference Result 624 states and 1069 transitions. [2019-11-06 22:37:30,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:30,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2019-11-06 22:37:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:30,727 INFO L225 Difference]: With dead ends: 624 [2019-11-06 22:37:30,728 INFO L226 Difference]: Without dead ends: 326 [2019-11-06 22:37:30,734 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 [2019-11-06 22:37:30,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-11-06 22:37:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 321. [2019-11-06 22:37:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-11-06 22:37:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 467 transitions. [2019-11-06 22:37:30,840 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 467 transitions. Word has length 89 [2019-11-06 22:37:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:30,842 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 467 transitions. [2019-11-06 22:37:30,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 467 transitions. [2019-11-06 22:37:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 22:37:30,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:30,856 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:37:30,857 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:30,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:30,858 INFO L82 PathProgramCache]: Analyzing trace with hash 784816566, now seen corresponding path program 1 times [2019-11-06 22:37:30,858 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:30,859 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66520968] [2019-11-06 22:37:30,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:31,073 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66520968] [2019-11-06 22:37:31,073 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:31,074 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:37:31,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215371926] [2019-11-06 22:37:31,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:37:31,076 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:31,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:37:31,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:31,077 INFO L87 Difference]: Start difference. First operand 321 states and 467 transitions. Second operand 3 states. [2019-11-06 22:37:31,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:31,620 INFO L93 Difference]: Finished difference Result 927 states and 1371 transitions. [2019-11-06 22:37:31,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:31,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2019-11-06 22:37:31,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:31,625 INFO L225 Difference]: With dead ends: 927 [2019-11-06 22:37:31,625 INFO L226 Difference]: Without dead ends: 612 [2019-11-06 22:37:31,627 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 [2019-11-06 22:37:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-06 22:37:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-06 22:37:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-06 22:37:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 797 transitions. [2019-11-06 22:37:31,654 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 797 transitions. Word has length 97 [2019-11-06 22:37:31,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:31,655 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 797 transitions. [2019-11-06 22:37:31,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 797 transitions. [2019-11-06 22:37:31,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 22:37:31,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:31,657 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:37:31,658 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:31,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:31,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1229109032, now seen corresponding path program 1 times [2019-11-06 22:37:31,658 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:31,659 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607330142] [2019-11-06 22:37:31,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:31,842 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607330142] [2019-11-06 22:37:31,842 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008208669] [2019-11-06 22:37:31,843 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 [2019-11-06 22:37:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:31,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:37:31,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:37:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:32,034 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:37:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:32,125 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:37:32,125 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-11-06 22:37:32,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641215021] [2019-11-06 22:37:32,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:37:32,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:32,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:37:32,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:37:32,134 INFO L87 Difference]: Start difference. First operand 612 states and 797 transitions. Second operand 4 states. [2019-11-06 22:37:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:33,211 INFO L93 Difference]: Finished difference Result 2233 states and 3021 transitions. [2019-11-06 22:37:33,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:37:33,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2019-11-06 22:37:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:33,222 INFO L225 Difference]: With dead ends: 2233 [2019-11-06 22:37:33,223 INFO L226 Difference]: Without dead ends: 1481 [2019-11-06 22:37:33,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:37:33,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2019-11-06 22:37:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1330. [2019-11-06 22:37:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1330 states. [2019-11-06 22:37:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1728 transitions. [2019-11-06 22:37:33,286 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1728 transitions. Word has length 102 [2019-11-06 22:37:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:33,286 INFO L462 AbstractCegarLoop]: Abstraction has 1330 states and 1728 transitions. [2019-11-06 22:37:33,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:37:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1728 transitions. [2019-11-06 22:37:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 22:37:33,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:33,291 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:37:33,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:37:33,496 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:33,497 INFO L82 PathProgramCache]: Analyzing trace with hash -4952584, now seen corresponding path program 1 times [2019-11-06 22:37:33,497 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:33,497 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550637304] [2019-11-06 22:37:33,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:33,684 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550637304] [2019-11-06 22:37:33,684 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:33,684 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:37:33,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91793090] [2019-11-06 22:37:33,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:37:33,686 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:33,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:37:33,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:37:33,686 INFO L87 Difference]: Start difference. First operand 1330 states and 1728 transitions. Second operand 6 states. [2019-11-06 22:37:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:34,626 INFO L93 Difference]: Finished difference Result 3292 states and 4438 transitions. [2019-11-06 22:37:34,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:37:34,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-11-06 22:37:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:34,643 INFO L225 Difference]: With dead ends: 3292 [2019-11-06 22:37:34,643 INFO L226 Difference]: Without dead ends: 1968 [2019-11-06 22:37:34,647 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 [2019-11-06 22:37:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2019-11-06 22:37:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1795. [2019-11-06 22:37:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1795 states. [2019-11-06 22:37:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2379 transitions. [2019-11-06 22:37:34,734 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2379 transitions. Word has length 110 [2019-11-06 22:37:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:34,734 INFO L462 AbstractCegarLoop]: Abstraction has 1795 states and 2379 transitions. [2019-11-06 22:37:34,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:37:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2379 transitions. [2019-11-06 22:37:34,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 22:37:34,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:34,740 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, 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] [2019-11-06 22:37:34,740 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:34,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1989299795, now seen corresponding path program 1 times [2019-11-06 22:37:34,741 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:34,742 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167489583] [2019-11-06 22:37:34,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:34,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167489583] [2019-11-06 22:37:34,863 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:34,863 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:37:34,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170266405] [2019-11-06 22:37:34,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:37:34,865 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:34,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:37:34,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:37:34,866 INFO L87 Difference]: Start difference. First operand 1795 states and 2379 transitions. Second operand 6 states. [2019-11-06 22:37:35,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:35,750 INFO L93 Difference]: Finished difference Result 4822 states and 6791 transitions. [2019-11-06 22:37:35,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:37:35,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2019-11-06 22:37:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:35,772 INFO L225 Difference]: With dead ends: 4822 [2019-11-06 22:37:35,772 INFO L226 Difference]: Without dead ends: 3033 [2019-11-06 22:37:35,778 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:37:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2019-11-06 22:37:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 2403. [2019-11-06 22:37:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2403 states. [2019-11-06 22:37:35,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 3195 transitions. [2019-11-06 22:37:35,876 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 3195 transitions. Word has length 121 [2019-11-06 22:37:35,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:35,876 INFO L462 AbstractCegarLoop]: Abstraction has 2403 states and 3195 transitions. [2019-11-06 22:37:35,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:37:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 3195 transitions. [2019-11-06 22:37:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-06 22:37:35,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:35,884 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, 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, 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] [2019-11-06 22:37:35,884 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:35,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:35,885 INFO L82 PathProgramCache]: Analyzing trace with hash 756035358, now seen corresponding path program 1 times [2019-11-06 22:37:35,885 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:35,885 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537839533] [2019-11-06 22:37:35,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:36,029 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537839533] [2019-11-06 22:37:36,029 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:36,029 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:37:36,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122949487] [2019-11-06 22:37:36,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:37:36,031 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:36,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:37:36,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:37:36,031 INFO L87 Difference]: Start difference. First operand 2403 states and 3195 transitions. Second operand 6 states. [2019-11-06 22:37:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:36,801 INFO L93 Difference]: Finished difference Result 4828 states and 6490 transitions. [2019-11-06 22:37:36,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:37:36,803 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2019-11-06 22:37:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:36,817 INFO L225 Difference]: With dead ends: 4828 [2019-11-06 22:37:36,818 INFO L226 Difference]: Without dead ends: 2431 [2019-11-06 22:37:36,824 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 [2019-11-06 22:37:36,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2019-11-06 22:37:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 2409. [2019-11-06 22:37:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2409 states. [2019-11-06 22:37:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 3068 transitions. [2019-11-06 22:37:36,890 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 3068 transitions. Word has length 151 [2019-11-06 22:37:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:36,891 INFO L462 AbstractCegarLoop]: Abstraction has 2409 states and 3068 transitions. [2019-11-06 22:37:36,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:37:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 3068 transitions. [2019-11-06 22:37:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-06 22:37:36,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:36,898 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, 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, 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] [2019-11-06 22:37:36,898 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:36,899 INFO L82 PathProgramCache]: Analyzing trace with hash -898624328, now seen corresponding path program 1 times [2019-11-06 22:37:36,899 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:36,899 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742472619] [2019-11-06 22:37:36,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:37,043 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742472619] [2019-11-06 22:37:37,043 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:37,044 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:37:37,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481804905] [2019-11-06 22:37:37,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:37:37,045 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:37,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:37:37,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:37:37,045 INFO L87 Difference]: Start difference. First operand 2409 states and 3068 transitions. Second operand 6 states. [2019-11-06 22:37:37,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:37,884 INFO L93 Difference]: Finished difference Result 5320 states and 7099 transitions. [2019-11-06 22:37:37,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:37:37,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-11-06 22:37:37,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:37,899 INFO L225 Difference]: With dead ends: 5320 [2019-11-06 22:37:37,900 INFO L226 Difference]: Without dead ends: 2615 [2019-11-06 22:37:37,907 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 [2019-11-06 22:37:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2019-11-06 22:37:37,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2415. [2019-11-06 22:37:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2415 states. [2019-11-06 22:37:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 2951 transitions. [2019-11-06 22:37:37,980 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 2951 transitions. Word has length 160 [2019-11-06 22:37:37,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:37,980 INFO L462 AbstractCegarLoop]: Abstraction has 2415 states and 2951 transitions. [2019-11-06 22:37:37,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:37:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 2951 transitions. [2019-11-06 22:37:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-06 22:37:37,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:37,987 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, 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] [2019-11-06 22:37:37,988 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:37,988 INFO L82 PathProgramCache]: Analyzing trace with hash 778950037, now seen corresponding path program 1 times [2019-11-06 22:37:37,988 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:37,988 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834375910] [2019-11-06 22:37:37,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:38,089 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834375910] [2019-11-06 22:37:38,089 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194630395] [2019-11-06 22:37:38,089 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 [2019-11-06 22:37:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:38,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:37:38,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:37:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:38,243 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:37:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:38,324 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [727658538] [2019-11-06 22:37:38,331 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 165 [2019-11-06 22:37:38,384 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:37:38,385 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)