/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_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:52:19,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:52:19,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:52:19,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:52:19,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:52:19,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:52:19,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:52:19,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:52:19,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:52:19,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:52:19,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:52:19,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:52:19,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:52:19,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:52:19,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:52:19,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:52:19,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:52:19,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:52:19,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:52:19,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:52:19,416 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 22:52:19,436 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:52:19,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:52:19,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:52:19,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:52:19,439 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:52:19,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:52:19,439 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:52:19,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:52:19,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:52:19,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:52:19,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:52:19,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:52:19,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:52:19,442 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:52:19,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:52:19,442 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:52:19,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:52:19,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:52:19,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:52:19,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:52:19,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:52:19,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:52:19,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:52:19,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:52:19,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:52:19,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:52:19,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:52:19,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:52:19,444 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 22:52:19,707 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:52:19,720 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:52:19,723 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:52:19,726 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:52:19,727 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:52:19,727 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-11-06 22:52:19,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d595b0dc/4627b421daf9469c8781bc27190e4fa6/FLAGb7661515b [2019-11-06 22:52:20,469 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:52:20,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-11-06 22:52:20,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d595b0dc/4627b421daf9469c8781bc27190e4fa6/FLAGb7661515b [2019-11-06 22:52:20,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d595b0dc/4627b421daf9469c8781bc27190e4fa6 [2019-11-06 22:52:20,613 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:52:20,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:52:20,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:52:20,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:52:20,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:52:20,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:20" (1/1) ... [2019-11-06 22:52:20,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a3f8a16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:20, skipping insertion in model container [2019-11-06 22:52:20,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:20" (1/1) ... [2019-11-06 22:52:20,630 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:52:20,717 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:52:21,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:52:21,580 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:52:21,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:52:21,979 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:52:21,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:21 WrapperNode [2019-11-06 22:52:21,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:52:21,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:52:21,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:52:21,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:52:21,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:21" (1/1) ... [2019-11-06 22:52:21,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:21" (1/1) ... [2019-11-06 22:52:22,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:21" (1/1) ... [2019-11-06 22:52:22,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:21" (1/1) ... [2019-11-06 22:52:22,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:21" (1/1) ... [2019-11-06 22:52:22,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:21" (1/1) ... [2019-11-06 22:52:22,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:21" (1/1) ... [2019-11-06 22:52:22,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:52:22,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:52:22,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:52:22,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:52:22,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:52:22,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:52:22,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:52:22,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:52:22,231 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:52:22,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:52:22,231 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:52:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:52:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:52:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:52:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:52:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:52:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:52:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:52:26,619 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:52:26,620 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:52:26,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:26 BoogieIcfgContainer [2019-11-06 22:52:26,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:52:26,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:52:26,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:52:26,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:52:26,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:52:20" (1/3) ... [2019-11-06 22:52:26,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d23b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:26, skipping insertion in model container [2019-11-06 22:52:26,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:21" (2/3) ... [2019-11-06 22:52:26,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d23b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:26, skipping insertion in model container [2019-11-06 22:52:26,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:26" (3/3) ... [2019-11-06 22:52:26,629 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label03.c [2019-11-06 22:52:26,639 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:52:26,647 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:52:26,660 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:52:26,702 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:52:26,703 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:52:26,703 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:52:26,703 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:52:26,703 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:52:26,704 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:52:26,704 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:52:26,704 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:52:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 22:52:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 22:52:26,751 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:26,752 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] [2019-11-06 22:52:26,754 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1047931325, now seen corresponding path program 1 times [2019-11-06 22:52:26,772 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:26,772 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288514793] [2019-11-06 22:52:26,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:27,090 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 22:52:27,091 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288514793] [2019-11-06 22:52:27,091 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:27,092 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:52:27,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235813427] [2019-11-06 22:52:27,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:52:27,104 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:27,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:52:27,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:52:27,121 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-11-06 22:52:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:31,325 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-11-06 22:52:31,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:52:31,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-11-06 22:52:31,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:31,366 INFO L225 Difference]: With dead ends: 1554 [2019-11-06 22:52:31,366 INFO L226 Difference]: Without dead ends: 1036 [2019-11-06 22:52:31,380 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 22:52:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-11-06 22:52:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-11-06 22:52:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-11-06 22:52:31,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-11-06 22:52:31,487 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 29 [2019-11-06 22:52:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:31,487 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-11-06 22:52:31,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:52:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-11-06 22:52:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 22:52:31,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:31,492 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:31,493 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:31,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:31,493 INFO L82 PathProgramCache]: Analyzing trace with hash 273136762, now seen corresponding path program 1 times [2019-11-06 22:52:31,493 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:31,494 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072712774] [2019-11-06 22:52:31,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:52:31,672 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072712774] [2019-11-06 22:52:31,672 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:31,672 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:52:31,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862203767] [2019-11-06 22:52:31,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:52:31,674 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:31,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:52:31,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:52:31,675 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-11-06 22:52:35,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:35,978 INFO L93 Difference]: Finished difference Result 2632 states and 4594 transitions. [2019-11-06 22:52:35,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:52:35,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2019-11-06 22:52:35,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:35,992 INFO L225 Difference]: With dead ends: 2632 [2019-11-06 22:52:35,992 INFO L226 Difference]: Without dead ends: 1941 [2019-11-06 22:52:35,996 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 22:52:35,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2019-11-06 22:52:36,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1936. [2019-11-06 22:52:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1936 states. [2019-11-06 22:52:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2971 transitions. [2019-11-06 22:52:36,100 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2971 transitions. Word has length 98 [2019-11-06 22:52:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:36,101 INFO L462 AbstractCegarLoop]: Abstraction has 1936 states and 2971 transitions. [2019-11-06 22:52:36,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:52:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2971 transitions. [2019-11-06 22:52:36,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-06 22:52:36,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:36,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:36,118 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:36,119 INFO L82 PathProgramCache]: Analyzing trace with hash 962295950, now seen corresponding path program 1 times [2019-11-06 22:52:36,119 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:36,119 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771216451] [2019-11-06 22:52:36,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:52:36,415 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771216451] [2019-11-06 22:52:36,415 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:36,416 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:52:36,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942547269] [2019-11-06 22:52:36,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:52:36,417 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:36,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:52:36,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:52:36,418 INFO L87 Difference]: Start difference. First operand 1936 states and 2971 transitions. Second operand 5 states. [2019-11-06 22:52:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:44,866 INFO L93 Difference]: Finished difference Result 5496 states and 8518 transitions. [2019-11-06 22:52:44,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:52:44,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2019-11-06 22:52:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:44,888 INFO L225 Difference]: With dead ends: 5496 [2019-11-06 22:52:44,888 INFO L226 Difference]: Without dead ends: 3566 [2019-11-06 22:52:44,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:52:44,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2019-11-06 22:52:44,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3546. [2019-11-06 22:52:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3546 states. [2019-11-06 22:52:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5185 transitions. [2019-11-06 22:52:44,998 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5185 transitions. Word has length 179 [2019-11-06 22:52:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:44,999 INFO L462 AbstractCegarLoop]: Abstraction has 3546 states and 5185 transitions. [2019-11-06 22:52:44,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:52:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5185 transitions. [2019-11-06 22:52:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-06 22:52:45,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:45,005 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 22:52:45,005 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:45,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1613892748, now seen corresponding path program 1 times [2019-11-06 22:52:45,006 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:45,006 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657427596] [2019-11-06 22:52:45,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:52:45,273 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657427596] [2019-11-06 22:52:45,273 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395261066] [2019-11-06 22:52:45,273 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 22:52:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:45,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:52:45,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:52:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-06 22:52:45,621 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:52:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:52:45,844 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:52:45,845 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:52:45,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729609453] [2019-11-06 22:52:45,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:52:45,846 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:45,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:52:45,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:52:45,847 INFO L87 Difference]: Start difference. First operand 3546 states and 5185 transitions. Second operand 5 states. [2019-11-06 22:52:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:49,316 INFO L93 Difference]: Finished difference Result 10012 states and 15157 transitions. [2019-11-06 22:52:49,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:52:49,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 202 [2019-11-06 22:52:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:49,352 INFO L225 Difference]: With dead ends: 10012 [2019-11-06 22:52:49,352 INFO L226 Difference]: Without dead ends: 6472 [2019-11-06 22:52:49,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 400 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:52:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6472 states. [2019-11-06 22:52:49,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6472 to 5183. [2019-11-06 22:52:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5183 states. [2019-11-06 22:52:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 7218 transitions. [2019-11-06 22:52:49,574 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 7218 transitions. Word has length 202 [2019-11-06 22:52:49,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:49,575 INFO L462 AbstractCegarLoop]: Abstraction has 5183 states and 7218 transitions. [2019-11-06 22:52:49,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:52:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 7218 transitions. [2019-11-06 22:52:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-11-06 22:52:49,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:49,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:49,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:52:49,787 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:49,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:49,788 INFO L82 PathProgramCache]: Analyzing trace with hash -450063927, now seen corresponding path program 1 times [2019-11-06 22:52:49,789 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:49,789 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388896585] [2019-11-06 22:52:49,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:52:50,194 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388896585] [2019-11-06 22:52:50,194 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376386403] [2019-11-06 22:52:50,195 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 22:52:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:50,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:52:50,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:52:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:52:50,602 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:52:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:52:51,058 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:52:51,058 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2019-11-06 22:52:51,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656025796] [2019-11-06 22:52:51,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:52:51,060 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:51,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:52:51,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:52:51,060 INFO L87 Difference]: Start difference. First operand 5183 states and 7218 transitions. Second operand 4 states. [2019-11-06 22:52:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:54,263 INFO L93 Difference]: Finished difference Result 14419 states and 20360 transitions. [2019-11-06 22:52:54,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:52:54,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 303 [2019-11-06 22:52:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:54,308 INFO L225 Difference]: With dead ends: 14419 [2019-11-06 22:52:54,309 INFO L226 Difference]: Without dead ends: 9242 [2019-11-06 22:52:54,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:52:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2019-11-06 22:52:54,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 7392. [2019-11-06 22:52:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7392 states. [2019-11-06 22:52:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7392 states to 7392 states and 10556 transitions. [2019-11-06 22:52:54,532 INFO L78 Accepts]: Start accepts. Automaton has 7392 states and 10556 transitions. Word has length 303 [2019-11-06 22:52:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:54,533 INFO L462 AbstractCegarLoop]: Abstraction has 7392 states and 10556 transitions. [2019-11-06 22:52:54,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:52:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 7392 states and 10556 transitions. [2019-11-06 22:52:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2019-11-06 22:52:54,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:54,544 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:54,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:52:54,748 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:54,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:54,749 INFO L82 PathProgramCache]: Analyzing trace with hash -845667041, now seen corresponding path program 1 times [2019-11-06 22:52:54,749 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:54,749 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971214466] [2019-11-06 22:52:54,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:52:55,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971214466] [2019-11-06 22:52:55,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509743132] [2019-11-06 22:52:55,289 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 22:52:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:55,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:52:55,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:52:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:52:55,571 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:52:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:52:55,760 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [849182780] [2019-11-06 22:52:55,767 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 403 [2019-11-06 22:52:55,828 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:52:55,829 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)