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_product28.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:56,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:56,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:56,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:56,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:56,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:56,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:56,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:56,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:56,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:56,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:56,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:56,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:56,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:56,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:56,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:56,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:56,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:56,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:56,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:56,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:56,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:56,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:56,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:56,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:56,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:56,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:56,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:56,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:56,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:56,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:56,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:56,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:56,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:56,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:56,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:56,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:56,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:56,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:56,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:56,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:56,457 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 21:09:56,489 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:56,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:56,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:56,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:56,491 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:56,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:56,492 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:56,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:56,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:56,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:56,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:56,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:56,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:56,494 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:56,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:56,494 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:56,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:56,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:56,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:56,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:56,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:56,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:56,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:56,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:56,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:56,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:56,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:56,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:56,501 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 21:09:56,774 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:56,787 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:56,790 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:56,792 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:56,792 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:56,793 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product28.cil.c [2019-10-13 21:09:56,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3978babb0/ba350abc44844cbc965ad18a3776fd47/FLAGeec0e48db [2019-10-13 21:09:57,437 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:57,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product28.cil.c [2019-10-13 21:09:57,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3978babb0/ba350abc44844cbc965ad18a3776fd47/FLAGeec0e48db [2019-10-13 21:09:57,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3978babb0/ba350abc44844cbc965ad18a3776fd47 [2019-10-13 21:09:57,681 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:57,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:57,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:57,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:57,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:57,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:57" (1/1) ... [2019-10-13 21:09:57,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60aa197e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:57, skipping insertion in model container [2019-10-13 21:09:57,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:57" (1/1) ... [2019-10-13 21:09:57,700 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:57,780 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:58,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:58,504 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:58,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:58,709 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:58,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:58 WrapperNode [2019-10-13 21:09:58,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:58,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:58,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:58,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:58,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:58" (1/1) ... [2019-10-13 21:09:58,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:58" (1/1) ... [2019-10-13 21:09:58,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:58" (1/1) ... [2019-10-13 21:09:58,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:58" (1/1) ... [2019-10-13 21:09:58,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:58" (1/1) ... [2019-10-13 21:09:58,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:58" (1/1) ... [2019-10-13 21:09:58,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:58" (1/1) ... [2019-10-13 21:09:58,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:58,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:58,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:58,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:58,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:58" (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 21:09:58,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:58,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:58,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:58,993 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:58,993 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:58,994 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:58,994 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:58,994 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:58,994 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:58,995 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:58,995 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:58,995 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:58,995 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:58,996 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:58,996 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:58,996 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:58,996 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:58,997 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:58,997 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:58,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:58,997 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:58,998 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:58,998 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:58,998 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:58,998 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:58,998 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:58,999 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:58,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:58,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:58,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:58,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:59,000 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:59,000 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:59,000 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:59,001 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:59,001 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:59,001 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:59,001 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:59,002 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:59,002 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:59,002 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:59,002 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:59,003 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:59,003 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:59,003 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:59,003 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:59,004 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:59,004 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:09:59,004 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:59,004 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:59,004 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:59,005 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:59,005 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:59,005 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:59,006 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:59,006 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:59,006 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:59,006 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:59,007 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:09:59,007 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:59,007 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:59,007 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:59,007 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:09:59,008 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:59,008 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:59,008 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:59,008 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-13 21:09:59,008 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:59,009 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-13 21:09:59,009 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:59,009 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:59,009 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:09:59,009 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:09:59,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:59,010 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:59,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:59,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:59,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:59,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:59,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:59,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:59,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:59,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:59,011 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:59,012 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:59,012 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:59,012 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:59,012 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:59,012 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:59,013 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:59,013 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:59,013 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:59,013 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:59,013 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:59,013 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:59,014 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:59,014 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:59,014 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:59,014 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:59,014 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:59,015 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:59,015 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:59,015 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:59,015 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:59,016 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:59,016 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:59,016 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:59,016 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:59,018 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:59,019 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:59,019 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:59,019 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:59,019 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:59,019 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:59,020 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:59,020 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:59,020 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:59,020 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:59,020 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:59,020 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:59,020 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:59,021 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:59,021 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:59,021 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:59,021 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:59,022 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:59,022 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:59,022 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:09:59,022 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:09:59,022 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:59,022 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:09:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:09:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:09:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:59,025 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-13 21:09:59,025 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-13 21:09:59,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:59,025 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:59,025 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:59,025 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:59,025 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:59,026 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:59,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:59,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:59,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:59,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:59,026 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:59,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:59,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:59,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:10:01,355 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:10:01,355 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:10:01,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:01 BoogieIcfgContainer [2019-10-13 21:10:01,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:10:01,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:10:01,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:10:01,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:10:01,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:57" (1/3) ... [2019-10-13 21:10:01,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2825ef58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:01, skipping insertion in model container [2019-10-13 21:10:01,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:58" (2/3) ... [2019-10-13 21:10:01,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2825ef58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:01, skipping insertion in model container [2019-10-13 21:10:01,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:01" (3/3) ... [2019-10-13 21:10:01,365 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product28.cil.c [2019-10-13 21:10:01,375 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:10:01,384 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:10:01,394 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:10:01,429 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:10:01,430 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:10:01,430 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:10:01,430 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:10:01,430 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:10:01,430 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:10:01,430 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:10:01,430 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:10:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states. [2019-10-13 21:10:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:10:01,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:01,504 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:01,506 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:01,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:01,512 INFO L82 PathProgramCache]: Analyzing trace with hash -837542985, now seen corresponding path program 1 times [2019-10-13 21:10:01,521 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:01,522 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611050855] [2019-10-13 21:10:01,523 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,523 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:02,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611050855] [2019-10-13 21:10:02,133 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709575540] [2019-10-13 21:10:02,133 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 21:10:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:10:02,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:02,962 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:03,157 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:03,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:10:03,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5768749] [2019-10-13 21:10:03,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:10:03,167 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:03,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:10:03,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:03,184 INFO L87 Difference]: Start difference. First operand 803 states. Second operand 2 states. [2019-10-13 21:10:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:03,289 INFO L93 Difference]: Finished difference Result 679 states and 1074 transitions. [2019-10-13 21:10:03,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:10:03,291 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-13 21:10:03,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:03,320 INFO L225 Difference]: With dead ends: 679 [2019-10-13 21:10:03,321 INFO L226 Difference]: Without dead ends: 642 [2019-10-13 21:10:03,331 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 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 21:10:03,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-13 21:10:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-13 21:10:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:10:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1019 transitions. [2019-10-13 21:10:03,473 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1019 transitions. Word has length 116 [2019-10-13 21:10:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:03,478 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1019 transitions. [2019-10-13 21:10:03,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:10:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1019 transitions. [2019-10-13 21:10:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 21:10:03,482 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:03,482 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:03,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,696 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:03,698 INFO L82 PathProgramCache]: Analyzing trace with hash -709376246, now seen corresponding path program 1 times [2019-10-13 21:10:03,698 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:03,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030444576] [2019-10-13 21:10:03,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:03,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030444576] [2019-10-13 21:10:03,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754745930] [2019-10-13 21:10:03,961 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 21:10:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:04,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:04,736 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:05,001 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:05,002 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:05,002 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384568378] [2019-10-13 21:10:05,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:05,003 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:05,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:05,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:05,004 INFO L87 Difference]: Start difference. First operand 642 states and 1019 transitions. Second operand 4 states. [2019-10-13 21:10:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:05,103 INFO L93 Difference]: Finished difference Result 1256 states and 2011 transitions. [2019-10-13 21:10:05,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:05,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-13 21:10:05,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:05,111 INFO L225 Difference]: With dead ends: 1256 [2019-10-13 21:10:05,111 INFO L226 Difference]: Without dead ends: 642 [2019-10-13 21:10:05,118 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 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 21:10:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-13 21:10:05,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-13 21:10:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:10:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1018 transitions. [2019-10-13 21:10:05,169 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1018 transitions. Word has length 118 [2019-10-13 21:10:05,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:05,171 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1018 transitions. [2019-10-13 21:10:05,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1018 transitions. [2019-10-13 21:10:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 21:10:05,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:05,179 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:05,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,387 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:05,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1594115156, now seen corresponding path program 1 times [2019-10-13 21:10:05,388 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:05,389 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56222547] [2019-10-13 21:10:05,389 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,389 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:05,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56222547] [2019-10-13 21:10:05,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813069604] [2019-10-13 21:10:05,587 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 21:10:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:06,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:06,210 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:06,409 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:06,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:06,410 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33438444] [2019-10-13 21:10:06,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:06,411 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:06,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:06,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:06,411 INFO L87 Difference]: Start difference. First operand 642 states and 1018 transitions. Second operand 4 states. [2019-10-13 21:10:06,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:06,496 INFO L93 Difference]: Finished difference Result 1256 states and 2009 transitions. [2019-10-13 21:10:06,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:06,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-13 21:10:06,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:06,548 INFO L225 Difference]: With dead ends: 1256 [2019-10-13 21:10:06,549 INFO L226 Difference]: Without dead ends: 642 [2019-10-13 21:10:06,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 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 21:10:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-13 21:10:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-13 21:10:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-13 21:10:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1017 transitions. [2019-10-13 21:10:06,577 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1017 transitions. Word has length 120 [2019-10-13 21:10:06,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:06,578 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1017 transitions. [2019-10-13 21:10:06,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:06,578 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1017 transitions. [2019-10-13 21:10:06,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:10:06,580 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:06,580 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:06,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,789 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash -254884654, now seen corresponding path program 1 times [2019-10-13 21:10:06,791 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:06,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028864402] [2019-10-13 21:10:06,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:06,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:06,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028864402] [2019-10-13 21:10:06,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408509473] [2019-10-13 21:10:06,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:10:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:07,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:07,509 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:07,786 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:07,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:07,787 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937308881] [2019-10-13 21:10:07,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:07,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:07,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:07,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:07,788 INFO L87 Difference]: Start difference. First operand 642 states and 1017 transitions. Second operand 4 states. [2019-10-13 21:10:07,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:07,878 INFO L93 Difference]: Finished difference Result 1263 states and 2016 transitions. [2019-10-13 21:10:07,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:07,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-13 21:10:07,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:07,887 INFO L225 Difference]: With dead ends: 1263 [2019-10-13 21:10:07,887 INFO L226 Difference]: Without dead ends: 651 [2019-10-13 21:10:07,890 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 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 21:10:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-13 21:10:07,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-13 21:10:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:10:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1029 transitions. [2019-10-13 21:10:07,928 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1029 transitions. Word has length 122 [2019-10-13 21:10:07,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:07,929 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1029 transitions. [2019-10-13 21:10:07,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1029 transitions. [2019-10-13 21:10:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:10:07,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:07,932 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:08,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,148 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:08,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:08,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1100707264, now seen corresponding path program 1 times [2019-10-13 21:10:08,149 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:08,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761901871] [2019-10-13 21:10:08,149 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:08,149 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:08,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:08,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761901871] [2019-10-13 21:10:08,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008340991] [2019-10-13 21:10:08,286 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 21:10:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:08,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:08,861 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:09,091 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:09,092 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:09,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783533722] [2019-10-13 21:10:09,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:09,093 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:09,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:09,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:09,093 INFO L87 Difference]: Start difference. First operand 651 states and 1029 transitions. Second operand 4 states. [2019-10-13 21:10:09,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:09,166 INFO L93 Difference]: Finished difference Result 1265 states and 2017 transitions. [2019-10-13 21:10:09,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:09,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-13 21:10:09,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:09,172 INFO L225 Difference]: With dead ends: 1265 [2019-10-13 21:10:09,172 INFO L226 Difference]: Without dead ends: 651 [2019-10-13 21:10:09,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 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 21:10:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-13 21:10:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-13 21:10:09,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:10:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1028 transitions. [2019-10-13 21:10:09,197 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1028 transitions. Word has length 123 [2019-10-13 21:10:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:09,198 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1028 transitions. [2019-10-13 21:10:09,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1028 transitions. [2019-10-13 21:10:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 21:10:09,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:09,200 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:09,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,407 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:09,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:09,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1202095766, now seen corresponding path program 1 times [2019-10-13 21:10:09,408 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:09,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401738145] [2019-10-13 21:10:09,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,409 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:09,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401738145] [2019-10-13 21:10:09,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999664518] [2019-10-13 21:10:09,507 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 21:10:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:10,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:10,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:10,080 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:10,333 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:10,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:10,334 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188017231] [2019-10-13 21:10:10,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:10,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:10,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:10,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:10,335 INFO L87 Difference]: Start difference. First operand 651 states and 1028 transitions. Second operand 4 states. [2019-10-13 21:10:10,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:10,418 INFO L93 Difference]: Finished difference Result 1265 states and 2016 transitions. [2019-10-13 21:10:10,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:10,419 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-13 21:10:10,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:10,425 INFO L225 Difference]: With dead ends: 1265 [2019-10-13 21:10:10,425 INFO L226 Difference]: Without dead ends: 651 [2019-10-13 21:10:10,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 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 21:10:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-13 21:10:10,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-13 21:10:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:10:10,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1027 transitions. [2019-10-13 21:10:10,450 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1027 transitions. Word has length 124 [2019-10-13 21:10:10,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:10,450 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1027 transitions. [2019-10-13 21:10:10,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:10,450 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1027 transitions. [2019-10-13 21:10:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:10:10,453 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:10,453 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:10,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:10,662 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1942679045, now seen corresponding path program 1 times [2019-10-13 21:10:10,663 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:10,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224639243] [2019-10-13 21:10:10,664 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:10,664 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:10,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:10,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224639243] [2019-10-13 21:10:10,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939525353] [2019-10-13 21:10:10,776 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 21:10:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:11,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:11,391 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:11,570 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:11,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:11,571 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639681195] [2019-10-13 21:10:11,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:11,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:11,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:11,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:11,572 INFO L87 Difference]: Start difference. First operand 651 states and 1027 transitions. Second operand 4 states. [2019-10-13 21:10:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:11,883 INFO L93 Difference]: Finished difference Result 1264 states and 2016 transitions. [2019-10-13 21:10:11,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:11,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-13 21:10:11,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:11,889 INFO L225 Difference]: With dead ends: 1264 [2019-10-13 21:10:11,889 INFO L226 Difference]: Without dead ends: 651 [2019-10-13 21:10:11,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:11,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-13 21:10:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-13 21:10:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:10:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1022 transitions. [2019-10-13 21:10:11,917 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1022 transitions. Word has length 125 [2019-10-13 21:10:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:11,918 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1022 transitions. [2019-10-13 21:10:11,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1022 transitions. [2019-10-13 21:10:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 21:10:11,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:11,921 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:12,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,140 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:12,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2038518113, now seen corresponding path program 1 times [2019-10-13 21:10:12,141 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:12,141 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719113841] [2019-10-13 21:10:12,141 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,142 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:12,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719113841] [2019-10-13 21:10:12,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410143380] [2019-10-13 21:10:12,252 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 21:10:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:12,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:12,888 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:13,101 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:13,101 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:13,102 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719843726] [2019-10-13 21:10:13,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:13,108 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:13,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:13,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:13,108 INFO L87 Difference]: Start difference. First operand 651 states and 1022 transitions. Second operand 4 states. [2019-10-13 21:10:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:13,280 INFO L93 Difference]: Finished difference Result 1264 states and 2006 transitions. [2019-10-13 21:10:13,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:13,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-13 21:10:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:13,291 INFO L225 Difference]: With dead ends: 1264 [2019-10-13 21:10:13,291 INFO L226 Difference]: Without dead ends: 651 [2019-10-13 21:10:13,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-13 21:10:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-13 21:10:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:10:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1017 transitions. [2019-10-13 21:10:13,326 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1017 transitions. Word has length 127 [2019-10-13 21:10:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:13,326 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1017 transitions. [2019-10-13 21:10:13,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1017 transitions. [2019-10-13 21:10:13,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 21:10:13,330 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:13,330 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:13,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:13,543 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:13,543 INFO L82 PathProgramCache]: Analyzing trace with hash 686521211, now seen corresponding path program 1 times [2019-10-13 21:10:13,544 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:13,544 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707426291] [2019-10-13 21:10:13,544 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:13,544 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:13,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:13,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707426291] [2019-10-13 21:10:13,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914394233] [2019-10-13 21:10:13,678 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 21:10:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:14,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:14,381 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:14,547 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:14,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:14,548 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899279] [2019-10-13 21:10:14,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:14,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:14,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:14,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:14,550 INFO L87 Difference]: Start difference. First operand 651 states and 1017 transitions. Second operand 4 states. [2019-10-13 21:10:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:14,755 INFO L93 Difference]: Finished difference Result 1300 states and 2055 transitions. [2019-10-13 21:10:14,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:14,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-13 21:10:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:14,760 INFO L225 Difference]: With dead ends: 1300 [2019-10-13 21:10:14,761 INFO L226 Difference]: Without dead ends: 690 [2019-10-13 21:10:14,763 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-13 21:10:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-10-13 21:10:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-13 21:10:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1081 transitions. [2019-10-13 21:10:14,783 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1081 transitions. Word has length 129 [2019-10-13 21:10:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:14,784 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1081 transitions. [2019-10-13 21:10:14,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:14,784 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1081 transitions. [2019-10-13 21:10:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:14,786 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:14,786 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:15,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:15,002 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:15,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:15,003 INFO L82 PathProgramCache]: Analyzing trace with hash 933168351, now seen corresponding path program 1 times [2019-10-13 21:10:15,003 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:15,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271798861] [2019-10-13 21:10:15,003 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:15,004 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:15,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:15,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271798861] [2019-10-13 21:10:15,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188103450] [2019-10-13 21:10:15,147 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 21:10:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:15,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:15,877 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:16,053 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:16,053 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:16,053 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767757570] [2019-10-13 21:10:16,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:16,054 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:16,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:16,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:16,055 INFO L87 Difference]: Start difference. First operand 690 states and 1081 transitions. Second operand 4 states. [2019-10-13 21:10:16,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:16,227 INFO L93 Difference]: Finished difference Result 1303 states and 2058 transitions. [2019-10-13 21:10:16,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:16,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-13 21:10:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:16,233 INFO L225 Difference]: With dead ends: 1303 [2019-10-13 21:10:16,233 INFO L226 Difference]: Without dead ends: 690 [2019-10-13 21:10:16,236 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:16,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-13 21:10:16,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-10-13 21:10:16,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-13 21:10:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1076 transitions. [2019-10-13 21:10:16,257 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1076 transitions. Word has length 130 [2019-10-13 21:10:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:16,257 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1076 transitions. [2019-10-13 21:10:16,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1076 transitions. [2019-10-13 21:10:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:16,259 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:16,259 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:16,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:16,470 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:16,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:16,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1678605474, now seen corresponding path program 1 times [2019-10-13 21:10:16,471 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:16,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943048643] [2019-10-13 21:10:16,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:16,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943048643] [2019-10-13 21:10:16,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842683004] [2019-10-13 21:10:16,618 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 21:10:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:17,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:17,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:17,281 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:17,613 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:17,613 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:17,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440739249] [2019-10-13 21:10:17,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:17,614 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:17,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:17,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:17,615 INFO L87 Difference]: Start difference. First operand 690 states and 1076 transitions. Second operand 11 states. [2019-10-13 21:10:17,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:17,874 INFO L93 Difference]: Finished difference Result 1248 states and 1964 transitions. [2019-10-13 21:10:17,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:17,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-13 21:10:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:17,880 INFO L225 Difference]: With dead ends: 1248 [2019-10-13 21:10:17,880 INFO L226 Difference]: Without dead ends: 710 [2019-10-13 21:10:17,885 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 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 21:10:17,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2019-10-13 21:10:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 697. [2019-10-13 21:10:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-13 21:10:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1085 transitions. [2019-10-13 21:10:17,913 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1085 transitions. Word has length 130 [2019-10-13 21:10:17,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:17,914 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1085 transitions. [2019-10-13 21:10:17,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1085 transitions. [2019-10-13 21:10:17,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 21:10:17,916 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:17,916 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:18,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:18,125 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:18,125 INFO L82 PathProgramCache]: Analyzing trace with hash -93500383, now seen corresponding path program 1 times [2019-10-13 21:10:18,125 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:18,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16759811] [2019-10-13 21:10:18,126 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:18,126 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:18,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:18,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16759811] [2019-10-13 21:10:18,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183283378] [2019-10-13 21:10:18,266 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 21:10:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:18,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:18,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:18,988 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:19,258 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:19,258 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:19,258 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953981074] [2019-10-13 21:10:19,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:19,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:19,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:19,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:19,259 INFO L87 Difference]: Start difference. First operand 697 states and 1085 transitions. Second operand 8 states. [2019-10-13 21:10:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:19,400 INFO L93 Difference]: Finished difference Result 1247 states and 1964 transitions. [2019-10-13 21:10:19,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:19,400 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2019-10-13 21:10:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:19,406 INFO L225 Difference]: With dead ends: 1247 [2019-10-13 21:10:19,406 INFO L226 Difference]: Without dead ends: 709 [2019-10-13 21:10:19,410 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 253 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 21:10:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2019-10-13 21:10:19,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 704. [2019-10-13 21:10:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2019-10-13 21:10:19,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1095 transitions. [2019-10-13 21:10:19,437 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1095 transitions. Word has length 131 [2019-10-13 21:10:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:19,437 INFO L462 AbstractCegarLoop]: Abstraction has 704 states and 1095 transitions. [2019-10-13 21:10:19,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:19,437 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1095 transitions. [2019-10-13 21:10:19,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 21:10:19,439 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:19,440 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:19,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:19,648 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:19,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:19,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2078138463, now seen corresponding path program 1 times [2019-10-13 21:10:19,648 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:19,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802829565] [2019-10-13 21:10:19,649 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:19,649 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:19,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:19,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802829565] [2019-10-13 21:10:19,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372969950] [2019-10-13 21:10:19,761 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 21:10:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:20,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:20,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:20,743 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:21,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:21,164 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:21,164 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:21,164 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018979417] [2019-10-13 21:10:21,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:21,165 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:21,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:21,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:21,166 INFO L87 Difference]: Start difference. First operand 704 states and 1095 transitions. Second operand 14 states. [2019-10-13 21:10:21,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:21,433 INFO L93 Difference]: Finished difference Result 1257 states and 1980 transitions. [2019-10-13 21:10:21,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:21,433 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2019-10-13 21:10:21,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:21,439 INFO L225 Difference]: With dead ends: 1257 [2019-10-13 21:10:21,439 INFO L226 Difference]: Without dead ends: 719 [2019-10-13 21:10:21,442 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 248 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2019-10-13 21:10:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2019-10-13 21:10:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-10-13 21:10:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1100 transitions. [2019-10-13 21:10:21,466 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1100 transitions. Word has length 131 [2019-10-13 21:10:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:21,466 INFO L462 AbstractCegarLoop]: Abstraction has 706 states and 1100 transitions. [2019-10-13 21:10:21,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1100 transitions. [2019-10-13 21:10:21,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 21:10:21,469 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:21,469 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:21,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:21,677 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:21,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:21,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1522197471, now seen corresponding path program 1 times [2019-10-13 21:10:21,678 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:21,679 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110118766] [2019-10-13 21:10:21,679 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:21,679 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:21,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:21,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110118766] [2019-10-13 21:10:21,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016725328] [2019-10-13 21:10:21,787 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 21:10:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:22,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:22,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:22,547 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:22,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:23,028 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:23,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:10:23,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361926673] [2019-10-13 21:10:23,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:23,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:23,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:23,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:23,030 INFO L87 Difference]: Start difference. First operand 706 states and 1100 transitions. Second operand 11 states. [2019-10-13 21:10:23,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:23,234 INFO L93 Difference]: Finished difference Result 1253 states and 1979 transitions. [2019-10-13 21:10:23,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:23,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-13 21:10:23,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:23,242 INFO L225 Difference]: With dead ends: 1253 [2019-10-13 21:10:23,242 INFO L226 Difference]: Without dead ends: 715 [2019-10-13 21:10:23,245 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 251 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 21:10:23,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2019-10-13 21:10:23,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 708. [2019-10-13 21:10:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2019-10-13 21:10:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1105 transitions. [2019-10-13 21:10:23,280 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1105 transitions. Word has length 132 [2019-10-13 21:10:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:23,280 INFO L462 AbstractCegarLoop]: Abstraction has 708 states and 1105 transitions. [2019-10-13 21:10:23,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1105 transitions. [2019-10-13 21:10:23,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:23,282 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:23,283 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:23,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:23,491 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:23,491 INFO L82 PathProgramCache]: Analyzing trace with hash -158307460, now seen corresponding path program 1 times [2019-10-13 21:10:23,491 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:23,491 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965468131] [2019-10-13 21:10:23,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:23,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:23,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:23,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965468131] [2019-10-13 21:10:23,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730486756] [2019-10-13 21:10:23,585 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 21:10:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:24,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:24,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:24,310 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:24,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:24,592 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:24,593 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-13 21:10:24,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372779135] [2019-10-13 21:10:24,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:24,593 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:24,594 INFO L87 Difference]: Start difference. First operand 708 states and 1105 transitions. Second operand 9 states. [2019-10-13 21:10:24,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:24,731 INFO L93 Difference]: Finished difference Result 1347 states and 2139 transitions. [2019-10-13 21:10:24,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:24,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-13 21:10:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:24,737 INFO L225 Difference]: With dead ends: 1347 [2019-10-13 21:10:24,737 INFO L226 Difference]: Without dead ends: 717 [2019-10-13 21:10:24,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2019-10-13 21:10:24,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2019-10-13 21:10:24,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2019-10-13 21:10:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1113 transitions. [2019-10-13 21:10:24,764 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1113 transitions. Word has length 133 [2019-10-13 21:10:24,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:24,764 INFO L462 AbstractCegarLoop]: Abstraction has 715 states and 1113 transitions. [2019-10-13 21:10:24,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1113 transitions. [2019-10-13 21:10:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 21:10:24,767 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:24,767 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:24,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:24,974 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:24,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:24,974 INFO L82 PathProgramCache]: Analyzing trace with hash -493741801, now seen corresponding path program 1 times [2019-10-13 21:10:24,975 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:24,975 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676969839] [2019-10-13 21:10:24,975 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,975 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:25,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676969839] [2019-10-13 21:10:25,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984345250] [2019-10-13 21:10:25,075 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 21:10:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:25,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:25,857 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:26,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:26,121 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:26,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-13 21:10:26,122 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294625451] [2019-10-13 21:10:26,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:26,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:26,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:26,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:26,126 INFO L87 Difference]: Start difference. First operand 715 states and 1113 transitions. Second operand 8 states. [2019-10-13 21:10:26,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:26,260 INFO L93 Difference]: Finished difference Result 1361 states and 2151 transitions. [2019-10-13 21:10:26,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:26,260 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-10-13 21:10:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:26,267 INFO L225 Difference]: With dead ends: 1361 [2019-10-13 21:10:26,267 INFO L226 Difference]: Without dead ends: 724 [2019-10-13 21:10:26,272 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:10:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2019-10-13 21:10:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 719. [2019-10-13 21:10:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 719 states. [2019-10-13 21:10:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1119 transitions. [2019-10-13 21:10:26,302 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1119 transitions. Word has length 134 [2019-10-13 21:10:26,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:26,303 INFO L462 AbstractCegarLoop]: Abstraction has 719 states and 1119 transitions. [2019-10-13 21:10:26,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:26,303 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1119 transitions. [2019-10-13 21:10:26,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 21:10:26,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:26,307 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:26,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:26,519 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:26,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:26,519 INFO L82 PathProgramCache]: Analyzing trace with hash -822391147, now seen corresponding path program 1 times [2019-10-13 21:10:26,519 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:26,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142291591] [2019-10-13 21:10:26,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:26,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142291591] [2019-10-13 21:10:26,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869212796] [2019-10-13 21:10:26,616 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 [2019-10-13 21:10:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:27,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:10:27,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 21:10:27,383 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:27,954 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:27,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 21:10:28,152 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:28,152 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [4] total 19 [2019-10-13 21:10:28,152 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695563181] [2019-10-13 21:10:28,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 21:10:28,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:28,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 21:10:28,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:10:28,154 INFO L87 Difference]: Start difference. First operand 719 states and 1119 transitions. Second operand 17 states. [2019-10-13 21:10:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:28,610 INFO L93 Difference]: Finished difference Result 1279 states and 2017 transitions. [2019-10-13 21:10:28,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 21:10:28,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2019-10-13 21:10:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:28,615 INFO L225 Difference]: With dead ends: 1279 [2019-10-13 21:10:28,615 INFO L226 Difference]: Without dead ends: 741 [2019-10-13 21:10:28,618 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-10-13 21:10:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2019-10-13 21:10:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 722. [2019-10-13 21:10:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2019-10-13 21:10:28,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1122 transitions. [2019-10-13 21:10:28,644 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1122 transitions. Word has length 135 [2019-10-13 21:10:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:28,646 INFO L462 AbstractCegarLoop]: Abstraction has 722 states and 1122 transitions. [2019-10-13 21:10:28,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 21:10:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1122 transitions. [2019-10-13 21:10:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 21:10:28,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:28,649 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:10:28,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:28,857 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:28,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:28,858 INFO L82 PathProgramCache]: Analyzing trace with hash -931286111, now seen corresponding path program 1 times [2019-10-13 21:10:28,858 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:28,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808631525] [2019-10-13 21:10:28,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:28,859 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:28,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:28,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808631525] [2019-10-13 21:10:28,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287727825] [2019-10-13 21:10:28,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:29,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 21:10:29,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 21:10:29,866 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:30,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:30,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:30,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:30,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:30,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 21:10:30,212 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:30,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [4] total 12 [2019-10-13 21:10:30,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906406775] [2019-10-13 21:10:30,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 21:10:30,213 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:30,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 21:10:30,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:10:30,214 INFO L87 Difference]: Start difference. First operand 722 states and 1122 transitions. Second operand 10 states.