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/product-lines/elevator_spec1_product11.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:38,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:38,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:38,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:38,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:38,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:38,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:38,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:38,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:38,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:38,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:38,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:38,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:38,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:38,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:38,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:38,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:38,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:38,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:38,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:38,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:38,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:38,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:38,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:38,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:38,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:38,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:38,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:38,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:38,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:38,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:38,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:38,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:38,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:38,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:38,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:38,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:38,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:38,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:38,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:38,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:38,452 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 [2019-10-13 21:09:38,490 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:38,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:38,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:38,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:38,492 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:38,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:38,493 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:38,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:38,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:38,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:38,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:38,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:38,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:38,499 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:38,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:38,500 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:38,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:38,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:38,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:38,501 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:38,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:38,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:38,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:38,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:38,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:38,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:38,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:38,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:38,505 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 [2019-10-13 21:09:38,802 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:38,820 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:38,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:38,827 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:38,828 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:38,828 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product11.cil.c [2019-10-13 21:09:38,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd7171b26/247c4587b50b4bf5b0bb588ac33ef837/FLAGbcf0f0de6 [2019-10-13 21:09:39,458 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:39,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product11.cil.c [2019-10-13 21:09:39,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd7171b26/247c4587b50b4bf5b0bb588ac33ef837/FLAGbcf0f0de6 [2019-10-13 21:09:39,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd7171b26/247c4587b50b4bf5b0bb588ac33ef837 [2019-10-13 21:09:39,755 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:39,757 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:39,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:39,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:39,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:39,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:39" (1/1) ... [2019-10-13 21:09:39,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7741f479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:39, skipping insertion in model container [2019-10-13 21:09:39,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:39" (1/1) ... [2019-10-13 21:09:39,777 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:39,869 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:40,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:40,576 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:40,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:40,773 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:40,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:40 WrapperNode [2019-10-13 21:09:40,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:40,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:40,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:40,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:40,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:40" (1/1) ... [2019-10-13 21:09:40,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:40" (1/1) ... [2019-10-13 21:09:40,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:40" (1/1) ... [2019-10-13 21:09:40,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:40" (1/1) ... [2019-10-13 21:09:40,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:40" (1/1) ... [2019-10-13 21:09:40,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:40" (1/1) ... [2019-10-13 21:09:41,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:40" (1/1) ... [2019-10-13 21:09:41,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:41,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:41,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:41,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:41,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:40" (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 [2019-10-13 21:09:41,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:41,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:41,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:41,103 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:41,103 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:41,104 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:41,104 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:41,105 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:41,105 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:41,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:41,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:41,106 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:41,107 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:41,108 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:41,108 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:41,108 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:41,110 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:41,110 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:41,111 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:41,111 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:41,111 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:41,111 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:41,112 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:41,112 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:41,112 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:41,112 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:41,112 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:09:41,113 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:41,113 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:41,113 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:41,114 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:09:41,114 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:41,114 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:41,114 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:41,114 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:41,115 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:41,115 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:41,115 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:09:41,115 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:09:41,115 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:41,115 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:41,116 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:41,116 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:41,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:41,116 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:41,116 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:41,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:41,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:41,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:41,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:41,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:41,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:41,118 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:41,118 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:41,118 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:41,119 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:41,119 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:41,119 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:41,119 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:41,120 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:41,120 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:41,121 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:41,121 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:41,121 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:41,121 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:41,122 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:41,122 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:41,122 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:41,122 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:41,122 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:41,123 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:41,123 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:41,123 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:41,124 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:41,124 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:41,125 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:41,125 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:09:41,133 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:09:41,133 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:41,133 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:41,133 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:41,134 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:41,134 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:41,134 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:41,134 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:09:41,134 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:41,135 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:41,135 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:09:41,135 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:41,135 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:41,137 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:41,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:41,137 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:41,137 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:41,138 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:41,138 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:41,138 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:41,138 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:41,139 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:41,139 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:41,139 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:41,139 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:41,140 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:41,142 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:41,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:41,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:41,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:41,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:41,143 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:41,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:41,144 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:41,144 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:41,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:41,144 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:41,144 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:41,145 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:41,145 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:41,145 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:41,145 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:41,145 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:41,145 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:43,292 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:43,292 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:43,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:43 BoogieIcfgContainer [2019-10-13 21:09:43,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:43,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:43,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:43,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:43,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:39" (1/3) ... [2019-10-13 21:09:43,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3f3552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:43, skipping insertion in model container [2019-10-13 21:09:43,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:40" (2/3) ... [2019-10-13 21:09:43,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3f3552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:43, skipping insertion in model container [2019-10-13 21:09:43,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:43" (3/3) ... [2019-10-13 21:09:43,307 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product11.cil.c [2019-10-13 21:09:43,320 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:43,336 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:43,348 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:43,396 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:43,396 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:43,396 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:43,397 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:43,397 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:43,397 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:43,397 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:43,397 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states. [2019-10-13 21:09:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:09:43,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:43,478 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:43,482 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:43,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2009729749, now seen corresponding path program 1 times [2019-10-13 21:09:43,500 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:43,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080366065] [2019-10-13 21:09:43,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:43,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:43,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:44,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080366065] [2019-10-13 21:09:44,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984845306] [2019-10-13 21:09:44,221 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 [2019-10-13 21:09:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:44,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 3257 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:09:44,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:44,962 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:45,335 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:45,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:09:45,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438033521] [2019-10-13 21:09:45,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:09:45,347 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:45,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:09:45,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:45,367 INFO L87 Difference]: Start difference. First operand 766 states. Second operand 2 states. [2019-10-13 21:09:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:45,463 INFO L93 Difference]: Finished difference Result 649 states and 1033 transitions. [2019-10-13 21:09:45,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:09:45,465 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 164 [2019-10-13 21:09:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:45,507 INFO L225 Difference]: With dead ends: 649 [2019-10-13 21:09:45,507 INFO L226 Difference]: Without dead ends: 612 [2019-10-13 21:09:45,514 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:45,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-13 21:09:45,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-13 21:09:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-13 21:09:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 978 transitions. [2019-10-13 21:09:45,632 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 978 transitions. Word has length 164 [2019-10-13 21:09:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:45,635 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 978 transitions. [2019-10-13 21:09:45,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:09:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 978 transitions. [2019-10-13 21:09:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:09:45,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:45,643 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:45,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:45,853 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:45,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2088381448, now seen corresponding path program 1 times [2019-10-13 21:09:45,853 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:45,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096481612] [2019-10-13 21:09:45,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:45,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:45,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:46,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096481612] [2019-10-13 21:09:46,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692495964] [2019-10-13 21:09:46,141 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 [2019-10-13 21:09:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:46,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 3260 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:46,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:46,922 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:47,308 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:47,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:47,309 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954288769] [2019-10-13 21:09:47,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:47,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:47,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:47,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:47,315 INFO L87 Difference]: Start difference. First operand 612 states and 978 transitions. Second operand 4 states. [2019-10-13 21:09:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:47,451 INFO L93 Difference]: Finished difference Result 1196 states and 1929 transitions. [2019-10-13 21:09:47,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:47,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-13 21:09:47,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:47,458 INFO L225 Difference]: With dead ends: 1196 [2019-10-13 21:09:47,458 INFO L226 Difference]: Without dead ends: 612 [2019-10-13 21:09:47,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-13 21:09:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-13 21:09:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-13 21:09:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 977 transitions. [2019-10-13 21:09:47,533 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 977 transitions. Word has length 166 [2019-10-13 21:09:47,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:47,534 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 977 transitions. [2019-10-13 21:09:47,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 977 transitions. [2019-10-13 21:09:47,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 21:09:47,545 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:47,545 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:47,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:47,747 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:47,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:47,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2119485278, now seen corresponding path program 1 times [2019-10-13 21:09:47,748 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:47,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724159] [2019-10-13 21:09:47,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:47,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:47,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:47,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724159] [2019-10-13 21:09:47,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529155073] [2019-10-13 21:09:47,919 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 [2019-10-13 21:09:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:48,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 3262 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:48,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:48,600 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:48,884 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:48,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:48,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649758759] [2019-10-13 21:09:48,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:48,886 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:48,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:48,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:48,886 INFO L87 Difference]: Start difference. First operand 612 states and 977 transitions. Second operand 4 states. [2019-10-13 21:09:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:48,958 INFO L93 Difference]: Finished difference Result 1196 states and 1927 transitions. [2019-10-13 21:09:48,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:48,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-10-13 21:09:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:48,964 INFO L225 Difference]: With dead ends: 1196 [2019-10-13 21:09:48,964 INFO L226 Difference]: Without dead ends: 612 [2019-10-13 21:09:48,968 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-13 21:09:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-13 21:09:48,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-13 21:09:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 976 transitions. [2019-10-13 21:09:48,996 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 976 transitions. Word has length 168 [2019-10-13 21:09:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:48,997 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 976 transitions. [2019-10-13 21:09:48,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 976 transitions. [2019-10-13 21:09:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:09:49,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:49,003 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:49,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:49,212 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:49,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1181326224, now seen corresponding path program 1 times [2019-10-13 21:09:49,213 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:49,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397964554] [2019-10-13 21:09:49,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,214 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:49,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397964554] [2019-10-13 21:09:49,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155918693] [2019-10-13 21:09:49,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 3264 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:50,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:50,074 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:50,402 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:50,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:50,402 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783741464] [2019-10-13 21:09:50,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:50,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:50,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:50,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:50,404 INFO L87 Difference]: Start difference. First operand 612 states and 976 transitions. Second operand 4 states. [2019-10-13 21:09:50,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:50,507 INFO L93 Difference]: Finished difference Result 1203 states and 1934 transitions. [2019-10-13 21:09:50,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:50,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-10-13 21:09:50,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:50,520 INFO L225 Difference]: With dead ends: 1203 [2019-10-13 21:09:50,520 INFO L226 Difference]: Without dead ends: 621 [2019-10-13 21:09:50,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-10-13 21:09:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-10-13 21:09:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-10-13 21:09:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 988 transitions. [2019-10-13 21:09:50,560 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 988 transitions. Word has length 170 [2019-10-13 21:09:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:50,561 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 988 transitions. [2019-10-13 21:09:50,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 988 transitions. [2019-10-13 21:09:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 21:09:50,568 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:50,569 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:50,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:50,778 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:50,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1277638939, now seen corresponding path program 1 times [2019-10-13 21:09:50,779 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:50,779 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901810837] [2019-10-13 21:09:50,780 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:50,780 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:50,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:50,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901810837] [2019-10-13 21:09:50,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040295630] [2019-10-13 21:09:50,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:51,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 3265 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:51,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:51,517 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:51,900 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:51,900 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:51,901 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166633960] [2019-10-13 21:09:51,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:51,902 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:51,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:51,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:51,903 INFO L87 Difference]: Start difference. First operand 621 states and 988 transitions. Second operand 4 states. [2019-10-13 21:09:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:52,009 INFO L93 Difference]: Finished difference Result 1205 states and 1935 transitions. [2019-10-13 21:09:52,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:52,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-10-13 21:09:52,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:52,015 INFO L225 Difference]: With dead ends: 1205 [2019-10-13 21:09:52,016 INFO L226 Difference]: Without dead ends: 621 [2019-10-13 21:09:52,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-10-13 21:09:52,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-10-13 21:09:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-10-13 21:09:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 987 transitions. [2019-10-13 21:09:52,055 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 987 transitions. Word has length 171 [2019-10-13 21:09:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:52,056 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 987 transitions. [2019-10-13 21:09:52,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 987 transitions. [2019-10-13 21:09:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 21:09:52,061 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:52,062 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:52,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:52,270 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:52,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:52,270 INFO L82 PathProgramCache]: Analyzing trace with hash 107661556, now seen corresponding path program 1 times [2019-10-13 21:09:52,270 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:52,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919881395] [2019-10-13 21:09:52,271 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,271 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:52,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919881395] [2019-10-13 21:09:52,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65750336] [2019-10-13 21:09:52,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:53,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 3266 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:53,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:53,070 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:53,419 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:53,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:09:53,420 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874441299] [2019-10-13 21:09:53,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:53,421 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:53,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:53,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:53,422 INFO L87 Difference]: Start difference. First operand 621 states and 987 transitions. Second operand 4 states. [2019-10-13 21:09:53,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:53,526 INFO L93 Difference]: Finished difference Result 1205 states and 1934 transitions. [2019-10-13 21:09:53,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:53,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-10-13 21:09:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:53,544 INFO L225 Difference]: With dead ends: 1205 [2019-10-13 21:09:53,545 INFO L226 Difference]: Without dead ends: 621 [2019-10-13 21:09:53,549 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:53,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-10-13 21:09:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-10-13 21:09:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-10-13 21:09:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 986 transitions. [2019-10-13 21:09:53,579 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 986 transitions. Word has length 172 [2019-10-13 21:09:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:53,581 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 986 transitions. [2019-10-13 21:09:53,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 986 transitions. [2019-10-13 21:09:53,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 21:09:53,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:53,592 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:53,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:53,813 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:53,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1662603201, now seen corresponding path program 1 times [2019-10-13 21:09:53,814 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:53,814 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842625266] [2019-10-13 21:09:53,815 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,815 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:54,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842625266] [2019-10-13 21:09:54,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837890347] [2019-10-13 21:09:54,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:54,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:54,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:54,723 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:55,102 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:55,102 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:09:55,102 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790238002] [2019-10-13 21:09:55,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:55,103 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:55,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:55,104 INFO L87 Difference]: Start difference. First operand 621 states and 986 transitions. Second operand 4 states. [2019-10-13 21:09:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:55,288 INFO L93 Difference]: Finished difference Result 1204 states and 1934 transitions. [2019-10-13 21:09:55,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:55,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-10-13 21:09:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:55,295 INFO L225 Difference]: With dead ends: 1204 [2019-10-13 21:09:55,295 INFO L226 Difference]: Without dead ends: 621 [2019-10-13 21:09:55,299 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:55,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-10-13 21:09:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-10-13 21:09:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-10-13 21:09:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 981 transitions. [2019-10-13 21:09:55,328 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 981 transitions. Word has length 173 [2019-10-13 21:09:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:55,329 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 981 transitions. [2019-10-13 21:09:55,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 981 transitions. [2019-10-13 21:09:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 21:09:55,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:55,335 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:55,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:55,545 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:55,546 INFO L82 PathProgramCache]: Analyzing trace with hash 795903017, now seen corresponding path program 1 times [2019-10-13 21:09:55,546 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:55,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99897624] [2019-10-13 21:09:55,547 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,547 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:55,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99897624] [2019-10-13 21:09:55,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277834220] [2019-10-13 21:09:55,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:56,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 3269 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:56,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:56,610 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:56,875 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:56,875 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:09:56,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849521630] [2019-10-13 21:09:56,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:56,876 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:56,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:56,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:56,877 INFO L87 Difference]: Start difference. First operand 621 states and 981 transitions. Second operand 4 states. [2019-10-13 21:09:57,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:57,034 INFO L93 Difference]: Finished difference Result 1204 states and 1924 transitions. [2019-10-13 21:09:57,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:57,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-10-13 21:09:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:57,040 INFO L225 Difference]: With dead ends: 1204 [2019-10-13 21:09:57,040 INFO L226 Difference]: Without dead ends: 621 [2019-10-13 21:09:57,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:57,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-10-13 21:09:57,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-10-13 21:09:57,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-10-13 21:09:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 976 transitions. [2019-10-13 21:09:57,110 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 976 transitions. Word has length 175 [2019-10-13 21:09:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:57,111 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 976 transitions. [2019-10-13 21:09:57,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 976 transitions. [2019-10-13 21:09:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 21:09:57,116 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:57,116 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:57,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:57,329 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:57,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1292592075, now seen corresponding path program 1 times [2019-10-13 21:09:57,329 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:57,330 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473537061] [2019-10-13 21:09:57,330 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:57,330 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:57,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:57,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473537061] [2019-10-13 21:09:57,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467415783] [2019-10-13 21:09:57,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 3271 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:58,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:58,323 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:58,616 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:58,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:09:58,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527240600] [2019-10-13 21:09:58,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:58,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:58,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:58,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:58,619 INFO L87 Difference]: Start difference. First operand 621 states and 976 transitions. Second operand 4 states. [2019-10-13 21:09:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:58,839 INFO L93 Difference]: Finished difference Result 1240 states and 1973 transitions. [2019-10-13 21:09:58,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:58,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-10-13 21:09:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:58,846 INFO L225 Difference]: With dead ends: 1240 [2019-10-13 21:09:58,846 INFO L226 Difference]: Without dead ends: 660 [2019-10-13 21:09:58,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2019-10-13 21:09:58,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 660. [2019-10-13 21:09:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2019-10-13 21:09:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1040 transitions. [2019-10-13 21:09:58,874 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1040 transitions. Word has length 177 [2019-10-13 21:09:58,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:58,874 INFO L462 AbstractCegarLoop]: Abstraction has 660 states and 1040 transitions. [2019-10-13 21:09:58,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1040 transitions. [2019-10-13 21:09:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:09:58,879 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:58,879 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:59,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:59,097 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:59,098 INFO L82 PathProgramCache]: Analyzing trace with hash 550468332, now seen corresponding path program 1 times [2019-10-13 21:09:59,098 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:59,098 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110918416] [2019-10-13 21:09:59,099 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:59,099 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:59,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:59,278 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110918416] [2019-10-13 21:09:59,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000112777] [2019-10-13 21:09:59,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 3272 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:00,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:00,126 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:00,412 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:00,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:00,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548110350] [2019-10-13 21:10:00,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:00,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:00,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:00,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:00,414 INFO L87 Difference]: Start difference. First operand 660 states and 1040 transitions. Second operand 4 states. [2019-10-13 21:10:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:00,636 INFO L93 Difference]: Finished difference Result 1243 states and 1976 transitions. [2019-10-13 21:10:00,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:00,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-13 21:10:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:00,643 INFO L225 Difference]: With dead ends: 1243 [2019-10-13 21:10:00,644 INFO L226 Difference]: Without dead ends: 660 [2019-10-13 21:10:00,647 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2019-10-13 21:10:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 660. [2019-10-13 21:10:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2019-10-13 21:10:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1035 transitions. [2019-10-13 21:10:00,669 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1035 transitions. Word has length 178 [2019-10-13 21:10:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:00,670 INFO L462 AbstractCegarLoop]: Abstraction has 660 states and 1035 transitions. [2019-10-13 21:10:00,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:00,670 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1035 transitions. [2019-10-13 21:10:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:10:00,674 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:00,675 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:00,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,889 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:00,889 INFO L82 PathProgramCache]: Analyzing trace with hash -231579797, now seen corresponding path program 1 times [2019-10-13 21:10:00,890 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:00,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33967559] [2019-10-13 21:10:00,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:01,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33967559] [2019-10-13 21:10:01,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548061809] [2019-10-13 21:10:01,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 3268 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:01,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:01,942 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:02,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:10:02,508 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:02,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:02,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476932995] [2019-10-13 21:10:02,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:02,510 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:02,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:02,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:02,511 INFO L87 Difference]: Start difference. First operand 660 states and 1035 transitions. Second operand 9 states. [2019-10-13 21:10:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:02,744 INFO L93 Difference]: Finished difference Result 1256 states and 1990 transitions. [2019-10-13 21:10:02,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:02,745 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-13 21:10:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:02,750 INFO L225 Difference]: With dead ends: 1256 [2019-10-13 21:10:02,750 INFO L226 Difference]: Without dead ends: 676 [2019-10-13 21:10:02,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 341 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:02,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2019-10-13 21:10:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 669. [2019-10-13 21:10:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2019-10-13 21:10:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1048 transitions. [2019-10-13 21:10:02,779 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1048 transitions. Word has length 178 [2019-10-13 21:10:02,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:02,779 INFO L462 AbstractCegarLoop]: Abstraction has 669 states and 1048 transitions. [2019-10-13 21:10:02,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1048 transitions. [2019-10-13 21:10:02,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:10:02,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:02,784 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:02,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,993 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:02,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1645689098, now seen corresponding path program 1 times [2019-10-13 21:10:02,994 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:02,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036846397] [2019-10-13 21:10:02,995 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,999 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:03,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036846397] [2019-10-13 21:10:03,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266037070] [2019-10-13 21:10:03,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:03,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:03,956 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:04,426 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:04,426 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:04,426 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176616895] [2019-10-13 21:10:04,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:04,427 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:04,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:04,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:04,428 INFO L87 Difference]: Start difference. First operand 669 states and 1048 transitions. Second operand 11 states. [2019-10-13 21:10:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:04,592 INFO L93 Difference]: Finished difference Result 1194 states and 1892 transitions. [2019-10-13 21:10:04,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:04,592 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 178 [2019-10-13 21:10:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:04,598 INFO L225 Difference]: With dead ends: 1194 [2019-10-13 21:10:04,599 INFO L226 Difference]: Without dead ends: 686 [2019-10-13 21:10:04,602 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 347 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2019-10-13 21:10:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 676. [2019-10-13 21:10:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2019-10-13 21:10:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1058 transitions. [2019-10-13 21:10:04,634 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1058 transitions. Word has length 178 [2019-10-13 21:10:04,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:04,636 INFO L462 AbstractCegarLoop]: Abstraction has 676 states and 1058 transitions. [2019-10-13 21:10:04,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1058 transitions. [2019-10-13 21:10:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:10:04,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:04,643 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:04,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:04,852 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:04,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2079475670, now seen corresponding path program 1 times [2019-10-13 21:10:04,853 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:04,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562146489] [2019-10-13 21:10:04,854 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,854 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:04,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:04,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562146489] [2019-10-13 21:10:04,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231063933] [2019-10-13 21:10:04,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 3268 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:05,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:05,818 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:06,174 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:06,174 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:06,174 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431903954] [2019-10-13 21:10:06,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:06,175 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:06,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:06,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:06,176 INFO L87 Difference]: Start difference. First operand 676 states and 1058 transitions. Second operand 8 states. [2019-10-13 21:10:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:06,297 INFO L93 Difference]: Finished difference Result 1198 states and 1901 transitions. [2019-10-13 21:10:06,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:06,298 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 179 [2019-10-13 21:10:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:06,303 INFO L225 Difference]: With dead ends: 1198 [2019-10-13 21:10:06,303 INFO L226 Difference]: Without dead ends: 690 [2019-10-13 21:10:06,306 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 349 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:06,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-13 21:10:06,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 683. [2019-10-13 21:10:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-10-13 21:10:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1069 transitions. [2019-10-13 21:10:06,334 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1069 transitions. Word has length 179 [2019-10-13 21:10:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:06,334 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1069 transitions. [2019-10-13 21:10:06,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1069 transitions. [2019-10-13 21:10:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:10:06,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:06,339 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:06,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,548 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:06,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2072147030, now seen corresponding path program 1 times [2019-10-13 21:10:06,548 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:06,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904874689] [2019-10-13 21:10:06,549 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,549 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:10:06,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904874689] [2019-10-13 21:10:06,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61747013] [2019-10-13 21:10:06,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 3264 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:07,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:10:07,558 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:08,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:10:08,218 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:08,219 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:08,219 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748213839] [2019-10-13 21:10:08,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:08,221 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:08,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:08,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:08,222 INFO L87 Difference]: Start difference. First operand 683 states and 1069 transitions. Second operand 14 states. [2019-10-13 21:10:08,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:08,464 INFO L93 Difference]: Finished difference Result 1199 states and 1901 transitions. [2019-10-13 21:10:08,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:08,465 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 179 [2019-10-13 21:10:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:08,469 INFO L225 Difference]: With dead ends: 1199 [2019-10-13 21:10:08,469 INFO L226 Difference]: Without dead ends: 691 [2019-10-13 21:10:08,473 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 344 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2019-10-13 21:10:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 683. [2019-10-13 21:10:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2019-10-13 21:10:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1069 transitions. [2019-10-13 21:10:08,500 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1069 transitions. Word has length 179 [2019-10-13 21:10:08,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:08,501 INFO L462 AbstractCegarLoop]: Abstraction has 683 states and 1069 transitions. [2019-10-13 21:10:08,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1069 transitions. [2019-10-13 21:10:08,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 21:10:08,505 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:08,505 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:08,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,722 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:08,723 INFO L82 PathProgramCache]: Analyzing trace with hash -17267335, now seen corresponding path program 1 times [2019-10-13 21:10:08,723 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:08,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966658197] [2019-10-13 21:10:08,723 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:08,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:08,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:10:08,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966658197] [2019-10-13 21:10:08,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547239798] [2019-10-13 21:10:08,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 3265 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:09,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:10:09,942 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:10,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:10:10,434 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:10,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:10:10,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125203961] [2019-10-13 21:10:10,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:10,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:10,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:10,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:10,436 INFO L87 Difference]: Start difference. First operand 683 states and 1069 transitions. Second operand 11 states. [2019-10-13 21:10:10,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:10,658 INFO L93 Difference]: Finished difference Result 1200 states and 1909 transitions. [2019-10-13 21:10:10,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:10,658 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 180 [2019-10-13 21:10:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:10,664 INFO L225 Difference]: With dead ends: 1200 [2019-10-13 21:10:10,664 INFO L226 Difference]: Without dead ends: 692 [2019-10-13 21:10:10,674 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 347 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-10-13 21:10:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 685. [2019-10-13 21:10:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-10-13 21:10:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1075 transitions. [2019-10-13 21:10:10,716 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1075 transitions. Word has length 180 [2019-10-13 21:10:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:10,719 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1075 transitions. [2019-10-13 21:10:10,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1075 transitions. [2019-10-13 21:10:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 21:10:10,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:10,725 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:10,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:10,935 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:10,935 INFO L82 PathProgramCache]: Analyzing trace with hash -492976219, now seen corresponding path program 1 times [2019-10-13 21:10:10,935 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:10,935 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155118686] [2019-10-13 21:10:10,936 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:10,936 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:10,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:10:11,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155118686] [2019-10-13 21:10:11,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480754879] [2019-10-13 21:10:11,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 3266 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:11,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:11,883 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:12,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:12,257 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:12,257 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-13 21:10:12,258 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171329740] [2019-10-13 21:10:12,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:12,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:12,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:12,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:12,260 INFO L87 Difference]: Start difference. First operand 685 states and 1075 transitions. Second operand 9 states. [2019-10-13 21:10:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:12,480 INFO L93 Difference]: Finished difference Result 1296 states and 2074 transitions. [2019-10-13 21:10:12,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:12,480 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 181 [2019-10-13 21:10:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:12,485 INFO L225 Difference]: With dead ends: 1296 [2019-10-13 21:10:12,486 INFO L226 Difference]: Without dead ends: 694 [2019-10-13 21:10:12,489 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 356 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2019-10-13 21:10:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 692. [2019-10-13 21:10:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2019-10-13 21:10:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1083 transitions. [2019-10-13 21:10:12,515 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1083 transitions. Word has length 181 [2019-10-13 21:10:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:12,515 INFO L462 AbstractCegarLoop]: Abstraction has 692 states and 1083 transitions. [2019-10-13 21:10:12,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1083 transitions. [2019-10-13 21:10:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 21:10:12,519 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:12,520 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:12,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,736 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:12,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:12,736 INFO L82 PathProgramCache]: Analyzing trace with hash -474601058, now seen corresponding path program 1 times [2019-10-13 21:10:12,736 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:12,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586583608] [2019-10-13 21:10:12,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:10:12,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586583608] [2019-10-13 21:10:12,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152043938] [2019-10-13 21:10:12,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true