/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/Problem15_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:52:30,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:52:30,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:52:30,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:52:30,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:52:30,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:52:30,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:52:30,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:52:30,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:52:30,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:52:30,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:52:30,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:52:30,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:52:30,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:52:30,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:52:30,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:52:30,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:52:30,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:52:30,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:52:30,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:52:30,130 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 22:52:30,144 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:52:30,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:52:30,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:52:30,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:52:30,146 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:52:30,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:52:30,147 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:52:30,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:52:30,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:52:30,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:52:30,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:52:30,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:52:30,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:52:30,148 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:52:30,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:52:30,149 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:52:30,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:52:30,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:52:30,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:52:30,149 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:52:30,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:52:30,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:52:30,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:52:30,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:52:30,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:52:30,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:52:30,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:52:30,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:52:30,151 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 22:52:30,466 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:52:30,479 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:52:30,483 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:52:30,484 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:52:30,485 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:52:30,485 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-11-06 22:52:30,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0f7818d/39a5c21e44d94a62b6ef4356b4cbd6af/FLAGab304edae [2019-11-06 22:52:31,280 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:52:31,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-11-06 22:52:31,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0f7818d/39a5c21e44d94a62b6ef4356b4cbd6af/FLAGab304edae [2019-11-06 22:52:31,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0f7818d/39a5c21e44d94a62b6ef4356b4cbd6af [2019-11-06 22:52:31,461 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:52:31,462 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:52:31,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:52:31,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:52:31,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:52:31,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:31" (1/1) ... [2019-11-06 22:52:31,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630fa84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:31, skipping insertion in model container [2019-11-06 22:52:31,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:31" (1/1) ... [2019-11-06 22:52:31,485 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:52:31,583 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:52:32,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:52:32,626 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:52:32,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:52:33,002 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:52:33,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33 WrapperNode [2019-11-06 22:52:33,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:52:33,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:52:33,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:52:33,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:52:33,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2019-11-06 22:52:33,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2019-11-06 22:52:33,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2019-11-06 22:52:33,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2019-11-06 22:52:33,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2019-11-06 22:52:33,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2019-11-06 22:52:33,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (1/1) ... [2019-11-06 22:52:33,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:52:33,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:52:33,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:52:33,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:52:33,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (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 22:52:33,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:52:33,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:52:33,348 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:52:33,348 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:52:33,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:52:33,348 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:52:33,349 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:52:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:52:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:52:33,350 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:52:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:52:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:52:33,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:52:36,726 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:52:36,726 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:52:36,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:36 BoogieIcfgContainer [2019-11-06 22:52:36,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:52:36,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:52:36,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:52:36,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:52:36,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:52:31" (1/3) ... [2019-11-06 22:52:36,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360b6be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:36, skipping insertion in model container [2019-11-06 22:52:36,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:33" (2/3) ... [2019-11-06 22:52:36,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360b6be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:36, skipping insertion in model container [2019-11-06 22:52:36,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:36" (3/3) ... [2019-11-06 22:52:36,736 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label14.c [2019-11-06 22:52:36,746 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:52:36,755 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:52:36,768 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:52:36,799 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:52:36,799 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:52:36,799 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:52:36,800 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:52:36,800 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:52:36,800 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:52:36,800 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:52:36,800 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:52:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 22:52:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 22:52:36,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:36,839 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] [2019-11-06 22:52:36,841 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:36,848 INFO L82 PathProgramCache]: Analyzing trace with hash -436791267, now seen corresponding path program 1 times [2019-11-06 22:52:36,859 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:36,859 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229856418] [2019-11-06 22:52:36,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:37,139 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 22:52:37,140 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229856418] [2019-11-06 22:52:37,141 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:37,141 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:52:37,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243999169] [2019-11-06 22:52:37,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:52:37,151 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:37,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:52:37,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:52:37,172 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-11-06 22:52:43,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:43,028 INFO L93 Difference]: Finished difference Result 1510 states and 2773 transitions. [2019-11-06 22:52:43,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:52:43,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-06 22:52:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:43,055 INFO L225 Difference]: With dead ends: 1510 [2019-11-06 22:52:43,055 INFO L226 Difference]: Without dead ends: 1006 [2019-11-06 22:52:43,069 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:52:43,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2019-11-06 22:52:43,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1004. [2019-11-06 22:52:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2019-11-06 22:52:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1509 transitions. [2019-11-06 22:52:43,195 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1509 transitions. Word has length 21 [2019-11-06 22:52:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:43,196 INFO L462 AbstractCegarLoop]: Abstraction has 1004 states and 1509 transitions. [2019-11-06 22:52:43,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:52:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1509 transitions. [2019-11-06 22:52:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 22:52:43,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:43,200 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:52:43,201 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:43,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1982781274, now seen corresponding path program 1 times [2019-11-06 22:52:43,201 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:43,202 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103893064] [2019-11-06 22:52:43,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:52:43,368 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103893064] [2019-11-06 22:52:43,368 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:43,368 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:52:43,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201398861] [2019-11-06 22:52:43,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:52:43,376 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:43,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:52:43,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:52:43,380 INFO L87 Difference]: Start difference. First operand 1004 states and 1509 transitions. Second operand 4 states. [2019-11-06 22:52:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:49,240 INFO L93 Difference]: Finished difference Result 3852 states and 5896 transitions. [2019-11-06 22:52:49,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:52:49,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2019-11-06 22:52:49,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:49,257 INFO L225 Difference]: With dead ends: 3852 [2019-11-06 22:52:49,258 INFO L226 Difference]: Without dead ends: 2854 [2019-11-06 22:52:49,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:52:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2019-11-06 22:52:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2852. [2019-11-06 22:52:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2852 states. [2019-11-06 22:52:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 3917 transitions. [2019-11-06 22:52:49,362 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 3917 transitions. Word has length 90 [2019-11-06 22:52:49,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:49,364 INFO L462 AbstractCegarLoop]: Abstraction has 2852 states and 3917 transitions. [2019-11-06 22:52:49,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:52:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 3917 transitions. [2019-11-06 22:52:49,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-11-06 22:52:49,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:49,382 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:52:49,382 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1171933402, now seen corresponding path program 1 times [2019-11-06 22:52:49,383 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:49,384 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159774491] [2019-11-06 22:52:49,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 29 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 22:52:49,859 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159774491] [2019-11-06 22:52:49,860 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112164755] [2019-11-06 22:52:49,860 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 22:52:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:49,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:52:49,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:52:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-06 22:52:50,164 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:52:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-06 22:52:50,592 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:52:50,594 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-11-06 22:52:50,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126118283] [2019-11-06 22:52:50,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:52:50,607 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:50,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:52:50,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:52:50,608 INFO L87 Difference]: Start difference. First operand 2852 states and 3917 transitions. Second operand 5 states. [2019-11-06 22:52:54,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:54,130 INFO L93 Difference]: Finished difference Result 8216 states and 11464 transitions. [2019-11-06 22:52:54,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:52:54,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 250 [2019-11-06 22:52:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:54,161 INFO L225 Difference]: With dead ends: 8216 [2019-11-06 22:52:54,161 INFO L226 Difference]: Without dead ends: 5370 [2019-11-06 22:52:54,170 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 499 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:52:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5370 states. [2019-11-06 22:52:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5370 to 5063. [2019-11-06 22:52:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5063 states. [2019-11-06 22:52:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 6546 transitions. [2019-11-06 22:52:54,323 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 6546 transitions. Word has length 250 [2019-11-06 22:52:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:54,327 INFO L462 AbstractCegarLoop]: Abstraction has 5063 states and 6546 transitions. [2019-11-06 22:52:54,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:52:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 6546 transitions. [2019-11-06 22:52:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-11-06 22:52:54,333 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:54,333 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:54,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:52:54,539 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash -666228620, now seen corresponding path program 1 times [2019-11-06 22:52:54,540 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:54,540 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196350904] [2019-11-06 22:52:54,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:52:54,901 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196350904] [2019-11-06 22:52:54,901 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:54,902 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:52:54,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201087065] [2019-11-06 22:52:54,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:52:54,904 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:54,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:52:54,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:52:54,905 INFO L87 Difference]: Start difference. First operand 5063 states and 6546 transitions. Second operand 4 states. [2019-11-06 22:52:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:59,543 INFO L93 Difference]: Finished difference Result 12973 states and 17536 transitions. [2019-11-06 22:52:59,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:52:59,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 301 [2019-11-06 22:52:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:59,585 INFO L225 Difference]: With dead ends: 12973 [2019-11-06 22:52:59,586 INFO L226 Difference]: Without dead ends: 7916 [2019-11-06 22:52:59,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:52:59,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7916 states. [2019-11-06 22:52:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7916 to 7911. [2019-11-06 22:52:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7911 states. [2019-11-06 22:52:59,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 10430 transitions. [2019-11-06 22:52:59,809 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 10430 transitions. Word has length 301 [2019-11-06 22:52:59,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:59,811 INFO L462 AbstractCegarLoop]: Abstraction has 7911 states and 10430 transitions. [2019-11-06 22:52:59,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:52:59,811 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 10430 transitions. [2019-11-06 22:52:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2019-11-06 22:52:59,825 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:59,825 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:59,826 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:59,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1150963853, now seen corresponding path program 1 times [2019-11-06 22:52:59,826 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:59,827 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698021224] [2019-11-06 22:52:59,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 206 proven. 17 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:53:00,378 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698021224] [2019-11-06 22:53:00,378 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138174313] [2019-11-06 22:53:00,378 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 22:53:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:00,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 22:53:00,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:00,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:53:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-06 22:53:00,867 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:00,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:00,993 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:01,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:01,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:01,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:01,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 42 proven. 170 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-06 22:53:01,809 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:53:01,810 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 13 [2019-11-06 22:53:01,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624483125] [2019-11-06 22:53:01,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:53:01,812 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:01,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:53:01,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:53:01,812 INFO L87 Difference]: Start difference. First operand 7911 states and 10430 transitions. Second operand 5 states. [2019-11-06 22:53:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:05,703 INFO L93 Difference]: Finished difference Result 16232 states and 21568 transitions. [2019-11-06 22:53:05,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:53:05,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 399 [2019-11-06 22:53:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:05,741 INFO L225 Difference]: With dead ends: 16232 [2019-11-06 22:53:05,741 INFO L226 Difference]: Without dead ends: 8327 [2019-11-06 22:53:05,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 794 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:53:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2019-11-06 22:53:05,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 7365. [2019-11-06 22:53:05,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7365 states. [2019-11-06 22:53:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7365 states to 7365 states and 9847 transitions. [2019-11-06 22:53:05,952 INFO L78 Accepts]: Start accepts. Automaton has 7365 states and 9847 transitions. Word has length 399 [2019-11-06 22:53:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:05,953 INFO L462 AbstractCegarLoop]: Abstraction has 7365 states and 9847 transitions. [2019-11-06 22:53:05,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:53:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 7365 states and 9847 transitions. [2019-11-06 22:53:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2019-11-06 22:53:05,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:05,974 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:06,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:06,188 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:06,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1117961884, now seen corresponding path program 1 times [2019-11-06 22:53:06,189 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:06,189 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864115903] [2019-11-06 22:53:06,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 206 proven. 17 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 22:53:06,704 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864115903] [2019-11-06 22:53:06,704 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253349863] [2019-11-06 22:53:06,704 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 [2019-11-06 22:53:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:06,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:53:06,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:06,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:53:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:53:07,070 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:07,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:07,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 124 proven. 80 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-06 22:53:07,394 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [979251543] [2019-11-06 22:53:07,400 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 474 [2019-11-06 22:53:07,458 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:53:07,459 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)