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 0.1.24-13a467a-m [2019-10-15 01:08:54,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:54,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:54,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:54,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:54,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:54,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:54,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:54,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:54,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:54,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:54,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:54,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:54,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:54,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:54,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:54,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:54,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:54,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:54,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:54,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:54,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:54,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:54,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:54,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:54,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:54,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:54,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:54,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:54,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:54,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:54,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:54,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:54,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:54,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:54,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:54,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:54,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:54,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:54,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:54,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:54,674 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 [2019-10-15 01:08:54,708 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:54,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:54,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:54,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:54,711 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:54,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:54,711 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:54,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:54,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:54,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:54,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:54,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:54,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:54,713 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:54,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:54,715 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:54,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:54,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:54,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:54,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:54,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:54,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:54,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:54,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:54,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:54,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:54,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:54,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:54,718 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 [2019-10-15 01:08:55,003 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:55,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:55,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:55,019 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:55,019 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:55,020 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product28.cil.c [2019-10-15 01:08:55,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbe96464/f86576242b814643bf14018dc95f5e0f/FLAG80dc4474d [2019-10-15 01:08:55,717 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:55,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product28.cil.c [2019-10-15 01:08:55,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbe96464/f86576242b814643bf14018dc95f5e0f/FLAG80dc4474d [2019-10-15 01:08:55,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbe96464/f86576242b814643bf14018dc95f5e0f [2019-10-15 01:08:55,896 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:55,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:55,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:55,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:55,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:55,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:55" (1/1) ... [2019-10-15 01:08:55,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11039f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:55, skipping insertion in model container [2019-10-15 01:08:55,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:55" (1/1) ... [2019-10-15 01:08:55,909 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:56,004 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:56,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:56,757 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:56,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:57,053 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:57,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:57 WrapperNode [2019-10-15 01:08:57,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:57,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:57,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:57,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:57,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:57" (1/1) ... [2019-10-15 01:08:57,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:57" (1/1) ... [2019-10-15 01:08:57,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:57" (1/1) ... [2019-10-15 01:08:57,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:57" (1/1) ... [2019-10-15 01:08:57,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:57" (1/1) ... [2019-10-15 01:08:57,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:57" (1/1) ... [2019-10-15 01:08:57,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:57" (1/1) ... [2019-10-15 01:08:57,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:57,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:57,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:57,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:57,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:57" (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 [2019-10-15 01:08:57,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:57,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:57,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:57,343 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:57,343 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:57,344 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:57,345 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:57,345 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:57,346 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:57,346 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:57,346 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:57,347 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:57,347 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:57,348 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:57,348 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:57,348 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:57,351 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:57,351 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:57,351 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:57,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:57,352 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:57,352 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:57,352 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:57,353 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:57,353 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:57,353 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:57,353 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:57,353 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:57,353 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:57,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:57,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:57,354 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:57,354 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:57,354 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:57,355 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:57,355 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:57,355 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:57,355 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:57,356 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:57,356 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:57,356 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:57,356 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:57,356 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:08:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:08:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 01:08:57,358 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:57,358 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:57,358 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:57,358 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:57,358 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:57,358 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:57,359 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:57,359 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:57,359 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:57,359 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:57,359 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:08:57,360 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:57,360 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:57,360 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:57,360 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:08:57,361 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:57,361 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:57,361 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:57,361 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-15 01:08:57,361 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:57,362 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-15 01:08:57,362 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:57,362 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:57,362 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 01:08:57,362 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 01:08:57,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:57,363 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:57,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:57,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:57,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:57,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:57,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:57,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:57,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:57,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:57,366 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:57,366 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:57,373 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:57,373 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:57,373 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:57,373 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:57,374 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:57,374 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:57,374 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:57,375 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:57,375 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:57,375 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:57,375 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:57,377 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:57,378 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:57,378 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:57,378 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:57,378 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:57,379 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:57,379 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:57,379 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:57,380 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:57,383 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 01:08:57,383 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 01:08:57,383 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:08:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:08:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 01:08:57,384 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:57,392 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:57,393 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:57,393 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:57,393 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:08:57,393 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:57,393 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:57,393 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:08:57,394 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:57,394 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:57,394 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:57,394 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-15 01:08:57,394 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-15 01:08:57,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:57,394 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:57,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:57,395 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:57,395 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:57,395 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:57,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:57,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:57,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:59,769 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:59,769 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:59,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:59 BoogieIcfgContainer [2019-10-15 01:08:59,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:59,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:59,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:59,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:59,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:55" (1/3) ... [2019-10-15 01:08:59,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2357f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:59, skipping insertion in model container [2019-10-15 01:08:59,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:57" (2/3) ... [2019-10-15 01:08:59,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2357f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:59, skipping insertion in model container [2019-10-15 01:08:59,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:59" (3/3) ... [2019-10-15 01:08:59,782 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product28.cil.c [2019-10-15 01:08:59,792 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:59,807 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:59,820 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:59,871 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:59,871 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:59,871 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:59,871 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:59,872 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:59,872 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:59,872 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:59,872 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states. [2019-10-15 01:08:59,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:08:59,933 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:59,934 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] [2019-10-15 01:08:59,936 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:59,942 INFO L82 PathProgramCache]: Analyzing trace with hash -837542985, now seen corresponding path program 1 times [2019-10-15 01:08:59,951 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:59,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626166150] [2019-10-15 01:08:59,952 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:59,952 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:59,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:00,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626166150] [2019-10-15 01:09:00,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21695659] [2019-10-15 01:09:00,576 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 [2019-10-15 01:09:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:09:01,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:01,412 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:01,615 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:01,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:09:01,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435568441] [2019-10-15 01:09:01,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:09:01,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:01,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:09:01,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:09:01,643 INFO L87 Difference]: Start difference. First operand 803 states. Second operand 2 states. [2019-10-15 01:09:01,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:01,723 INFO L93 Difference]: Finished difference Result 679 states and 1074 transitions. [2019-10-15 01:09:01,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:09:01,727 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-15 01:09:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:01,756 INFO L225 Difference]: With dead ends: 679 [2019-10-15 01:09:01,756 INFO L226 Difference]: Without dead ends: 642 [2019-10-15 01:09:01,761 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 [2019-10-15 01:09:01,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-15 01:09:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-15 01:09:01,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1019 transitions. [2019-10-15 01:09:01,876 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1019 transitions. Word has length 116 [2019-10-15 01:09:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:01,878 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1019 transitions. [2019-10-15 01:09:01,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:09:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1019 transitions. [2019-10-15 01:09:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:09:01,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:01,884 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] [2019-10-15 01:09:02,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:02,102 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:02,102 INFO L82 PathProgramCache]: Analyzing trace with hash -709376246, now seen corresponding path program 1 times [2019-10-15 01:09:02,102 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:02,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695446056] [2019-10-15 01:09:02,103 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:02,103 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:02,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:02,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695446056] [2019-10-15 01:09:02,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558557309] [2019-10-15 01:09:02,295 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 [2019-10-15 01:09:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:02,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:02,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:02,959 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:03,309 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:03,310 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:03,310 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533326244] [2019-10-15 01:09:03,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:03,312 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:03,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:03,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:03,313 INFO L87 Difference]: Start difference. First operand 642 states and 1019 transitions. Second operand 4 states. [2019-10-15 01:09:03,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:03,451 INFO L93 Difference]: Finished difference Result 1256 states and 2011 transitions. [2019-10-15 01:09:03,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:03,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-15 01:09:03,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:03,463 INFO L225 Difference]: With dead ends: 1256 [2019-10-15 01:09:03,464 INFO L226 Difference]: Without dead ends: 642 [2019-10-15 01:09:03,472 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 [2019-10-15 01:09:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-15 01:09:03,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-15 01:09:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1018 transitions. [2019-10-15 01:09:03,533 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1018 transitions. Word has length 118 [2019-10-15 01:09:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:03,534 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1018 transitions. [2019-10-15 01:09:03,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1018 transitions. [2019-10-15 01:09:03,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 01:09:03,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:03,542 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] [2019-10-15 01:09:03,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:03,751 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:03,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1594115156, now seen corresponding path program 1 times [2019-10-15 01:09:03,751 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:03,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593666301] [2019-10-15 01:09:03,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:03,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:03,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593666301] [2019-10-15 01:09:03,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075190184] [2019-10-15 01:09:03,940 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 [2019-10-15 01:09:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:04,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:04,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:04,624 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:04,826 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:04,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:04,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126156203] [2019-10-15 01:09:04,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:04,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:04,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:04,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:04,828 INFO L87 Difference]: Start difference. First operand 642 states and 1018 transitions. Second operand 4 states. [2019-10-15 01:09:04,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:04,895 INFO L93 Difference]: Finished difference Result 1256 states and 2009 transitions. [2019-10-15 01:09:04,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:04,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-15 01:09:04,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:04,900 INFO L225 Difference]: With dead ends: 1256 [2019-10-15 01:09:04,900 INFO L226 Difference]: Without dead ends: 642 [2019-10-15 01:09:04,903 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 [2019-10-15 01:09:04,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-10-15 01:09:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-10-15 01:09:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-10-15 01:09:04,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1017 transitions. [2019-10-15 01:09:04,927 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1017 transitions. Word has length 120 [2019-10-15 01:09:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:04,928 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 1017 transitions. [2019-10-15 01:09:04,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:04,928 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1017 transitions. [2019-10-15 01:09:04,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 01:09:04,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:04,930 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] [2019-10-15 01:09:05,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:05,138 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:05,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:05,139 INFO L82 PathProgramCache]: Analyzing trace with hash -254884654, now seen corresponding path program 1 times [2019-10-15 01:09:05,139 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:05,139 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701358135] [2019-10-15 01:09:05,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:05,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:05,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:05,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701358135] [2019-10-15 01:09:05,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875388015] [2019-10-15 01:09:05,265 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 [2019-10-15 01:09:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:05,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:05,967 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:06,204 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:06,204 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:06,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842825400] [2019-10-15 01:09:06,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:06,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:06,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:06,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:06,207 INFO L87 Difference]: Start difference. First operand 642 states and 1017 transitions. Second operand 4 states. [2019-10-15 01:09:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:06,296 INFO L93 Difference]: Finished difference Result 1263 states and 2016 transitions. [2019-10-15 01:09:06,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:06,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-15 01:09:06,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:06,305 INFO L225 Difference]: With dead ends: 1263 [2019-10-15 01:09:06,306 INFO L226 Difference]: Without dead ends: 651 [2019-10-15 01:09:06,308 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 [2019-10-15 01:09:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-15 01:09:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-15 01:09:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-15 01:09:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1029 transitions. [2019-10-15 01:09:06,338 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1029 transitions. Word has length 122 [2019-10-15 01:09:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:06,338 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1029 transitions. [2019-10-15 01:09:06,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1029 transitions. [2019-10-15 01:09:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:09:06,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:06,341 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] [2019-10-15 01:09:06,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:06,549 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:06,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:06,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1100707264, now seen corresponding path program 1 times [2019-10-15 01:09:06,550 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:06,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111905192] [2019-10-15 01:09:06,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:06,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:06,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111905192] [2019-10-15 01:09:06,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711298403] [2019-10-15 01:09:06,669 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 [2019-10-15 01:09:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:07,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:07,344 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:07,600 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:07,600 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:07,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137884945] [2019-10-15 01:09:07,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:07,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:07,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:07,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:07,602 INFO L87 Difference]: Start difference. First operand 651 states and 1029 transitions. Second operand 4 states. [2019-10-15 01:09:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:07,697 INFO L93 Difference]: Finished difference Result 1265 states and 2017 transitions. [2019-10-15 01:09:07,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:07,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-15 01:09:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:07,714 INFO L225 Difference]: With dead ends: 1265 [2019-10-15 01:09:07,714 INFO L226 Difference]: Without dead ends: 651 [2019-10-15 01:09:07,721 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 [2019-10-15 01:09:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-15 01:09:07,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-15 01:09:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-15 01:09:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1028 transitions. [2019-10-15 01:09:07,751 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1028 transitions. Word has length 123 [2019-10-15 01:09:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:07,751 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1028 transitions. [2019-10-15 01:09:07,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1028 transitions. [2019-10-15 01:09:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 01:09:07,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:07,755 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] [2019-10-15 01:09:07,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:07,963 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:07,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:07,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1202095766, now seen corresponding path program 1 times [2019-10-15 01:09:07,964 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:07,964 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324327977] [2019-10-15 01:09:07,965 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,965 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:08,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324327977] [2019-10-15 01:09:08,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113496865] [2019-10-15 01:09:08,086 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 [2019-10-15 01:09:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:08,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:08,799 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:08,996 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:08,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:08,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609395338] [2019-10-15 01:09:08,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:08,998 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:08,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:08,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:08,998 INFO L87 Difference]: Start difference. First operand 651 states and 1028 transitions. Second operand 4 states. [2019-10-15 01:09:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:09,067 INFO L93 Difference]: Finished difference Result 1265 states and 2016 transitions. [2019-10-15 01:09:09,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:09,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-15 01:09:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:09,073 INFO L225 Difference]: With dead ends: 1265 [2019-10-15 01:09:09,073 INFO L226 Difference]: Without dead ends: 651 [2019-10-15 01:09:09,076 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 [2019-10-15 01:09:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-15 01:09:09,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-15 01:09:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-15 01:09:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1027 transitions. [2019-10-15 01:09:09,097 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1027 transitions. Word has length 124 [2019-10-15 01:09:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:09,098 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1027 transitions. [2019-10-15 01:09:09,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:09,098 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1027 transitions. [2019-10-15 01:09:09,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:09:09,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:09,100 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] [2019-10-15 01:09:09,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:09,310 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:09,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:09,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1942679045, now seen corresponding path program 1 times [2019-10-15 01:09:09,311 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:09,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796813441] [2019-10-15 01:09:09,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:09,452 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796813441] [2019-10-15 01:09:09,452 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835861010] [2019-10-15 01:09:09,452 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 [2019-10-15 01:09:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:10,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:10,168 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:10,377 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:10,377 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:10,377 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101378837] [2019-10-15 01:09:10,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:10,378 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:10,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:10,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:10,379 INFO L87 Difference]: Start difference. First operand 651 states and 1027 transitions. Second operand 4 states. [2019-10-15 01:09:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:10,596 INFO L93 Difference]: Finished difference Result 1264 states and 2016 transitions. [2019-10-15 01:09:10,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:10,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-15 01:09:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:10,602 INFO L225 Difference]: With dead ends: 1264 [2019-10-15 01:09:10,602 INFO L226 Difference]: Without dead ends: 651 [2019-10-15 01:09:10,606 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:10,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-15 01:09:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-15 01:09:10,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-15 01:09:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1022 transitions. [2019-10-15 01:09:10,626 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1022 transitions. Word has length 125 [2019-10-15 01:09:10,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:10,627 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1022 transitions. [2019-10-15 01:09:10,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1022 transitions. [2019-10-15 01:09:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 01:09:10,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:10,629 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] [2019-10-15 01:09:10,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:10,846 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:10,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:10,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2038518113, now seen corresponding path program 1 times [2019-10-15 01:09:10,847 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:10,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571482434] [2019-10-15 01:09:10,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:10,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:10,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:10,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571482434] [2019-10-15 01:09:10,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041432842] [2019-10-15 01:09:10,965 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 [2019-10-15 01:09:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:11,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:11,602 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:11,848 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:11,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:11,849 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979003177] [2019-10-15 01:09:11,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:11,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:11,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:11,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:11,850 INFO L87 Difference]: Start difference. First operand 651 states and 1022 transitions. Second operand 4 states. [2019-10-15 01:09:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:12,029 INFO L93 Difference]: Finished difference Result 1264 states and 2006 transitions. [2019-10-15 01:09:12,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:12,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-15 01:09:12,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:12,034 INFO L225 Difference]: With dead ends: 1264 [2019-10-15 01:09:12,034 INFO L226 Difference]: Without dead ends: 651 [2019-10-15 01:09:12,041 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 [2019-10-15 01:09:12,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-15 01:09:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-15 01:09:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-15 01:09:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1017 transitions. [2019-10-15 01:09:12,063 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1017 transitions. Word has length 127 [2019-10-15 01:09:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:12,064 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1017 transitions. [2019-10-15 01:09:12,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1017 transitions. [2019-10-15 01:09:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 01:09:12,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:12,066 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] [2019-10-15 01:09:12,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:12,274 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:12,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:12,275 INFO L82 PathProgramCache]: Analyzing trace with hash 686521211, now seen corresponding path program 1 times [2019-10-15 01:09:12,275 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:12,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483994786] [2019-10-15 01:09:12,276 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:12,276 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:12,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:12,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483994786] [2019-10-15 01:09:12,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691206630] [2019-10-15 01:09:12,419 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 [2019-10-15 01:09:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:13,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:13,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:13,320 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:13,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:13,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:13,541 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310264418] [2019-10-15 01:09:13,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:13,542 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:13,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:13,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:13,543 INFO L87 Difference]: Start difference. First operand 651 states and 1017 transitions. Second operand 4 states. [2019-10-15 01:09:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:13,742 INFO L93 Difference]: Finished difference Result 1300 states and 2055 transitions. [2019-10-15 01:09:13,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:13,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-15 01:09:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:13,748 INFO L225 Difference]: With dead ends: 1300 [2019-10-15 01:09:13,748 INFO L226 Difference]: Without dead ends: 690 [2019-10-15 01:09:13,751 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 [2019-10-15 01:09:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-15 01:09:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-10-15 01:09:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-15 01:09:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1081 transitions. [2019-10-15 01:09:13,772 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1081 transitions. Word has length 129 [2019-10-15 01:09:13,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:13,772 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1081 transitions. [2019-10-15 01:09:13,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:13,772 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1081 transitions. [2019-10-15 01:09:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:13,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:13,775 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] [2019-10-15 01:09:13,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:13,984 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:13,985 INFO L82 PathProgramCache]: Analyzing trace with hash 933168351, now seen corresponding path program 1 times [2019-10-15 01:09:13,985 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:13,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933481791] [2019-10-15 01:09:13,986 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,986 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:13,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:14,112 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933481791] [2019-10-15 01:09:14,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502400817] [2019-10-15 01:09:14,113 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 [2019-10-15 01:09:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:14,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:14,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:14,958 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:15,258 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:15,258 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:15,259 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966843047] [2019-10-15 01:09:15,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:15,260 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:15,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:15,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:15,260 INFO L87 Difference]: Start difference. First operand 690 states and 1081 transitions. Second operand 4 states. [2019-10-15 01:09:15,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:15,471 INFO L93 Difference]: Finished difference Result 1303 states and 2058 transitions. [2019-10-15 01:09:15,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:15,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-15 01:09:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:15,479 INFO L225 Difference]: With dead ends: 1303 [2019-10-15 01:09:15,479 INFO L226 Difference]: Without dead ends: 690 [2019-10-15 01:09:15,483 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 [2019-10-15 01:09:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-15 01:09:15,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-10-15 01:09:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-15 01:09:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1076 transitions. [2019-10-15 01:09:15,527 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1076 transitions. Word has length 130 [2019-10-15 01:09:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:15,527 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1076 transitions. [2019-10-15 01:09:15,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1076 transitions. [2019-10-15 01:09:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:15,529 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:15,530 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] [2019-10-15 01:09:15,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:15,740 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:15,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1678605474, now seen corresponding path program 1 times [2019-10-15 01:09:15,741 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:15,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695779399] [2019-10-15 01:09:15,741 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:15,741 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:15,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:15,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695779399] [2019-10-15 01:09:15,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661652100] [2019-10-15 01:09:15,833 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 [2019-10-15 01:09:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:16,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:16,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:16,582 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:16,906 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:16,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:16,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87529370] [2019-10-15 01:09:16,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:16,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:16,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:16,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:16,908 INFO L87 Difference]: Start difference. First operand 690 states and 1076 transitions. Second operand 11 states. [2019-10-15 01:09:17,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:17,081 INFO L93 Difference]: Finished difference Result 1248 states and 1964 transitions. [2019-10-15 01:09:17,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:17,082 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-15 01:09:17,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:17,087 INFO L225 Difference]: With dead ends: 1248 [2019-10-15 01:09:17,088 INFO L226 Difference]: Without dead ends: 710 [2019-10-15 01:09:17,091 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 [2019-10-15 01:09:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2019-10-15 01:09:17,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 697. [2019-10-15 01:09:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-15 01:09:17,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1085 transitions. [2019-10-15 01:09:17,116 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1085 transitions. Word has length 130 [2019-10-15 01:09:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:17,116 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1085 transitions. [2019-10-15 01:09:17,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:17,116 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1085 transitions. [2019-10-15 01:09:17,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:09:17,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:17,119 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] [2019-10-15 01:09:17,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:17,336 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:17,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:17,336 INFO L82 PathProgramCache]: Analyzing trace with hash -93500383, now seen corresponding path program 1 times [2019-10-15 01:09:17,336 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:17,337 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035148136] [2019-10-15 01:09:17,337 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,337 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:17,453 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035148136] [2019-10-15 01:09:17,453 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757894024] [2019-10-15 01:09:17,454 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 [2019-10-15 01:09:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:18,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:18,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:18,190 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:18,495 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:18,496 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:18,496 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975259020] [2019-10-15 01:09:18,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:18,498 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:18,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:18,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:18,499 INFO L87 Difference]: Start difference. First operand 697 states and 1085 transitions. Second operand 8 states. [2019-10-15 01:09:18,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:18,638 INFO L93 Difference]: Finished difference Result 1247 states and 1964 transitions. [2019-10-15 01:09:18,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:18,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2019-10-15 01:09:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:18,646 INFO L225 Difference]: With dead ends: 1247 [2019-10-15 01:09:18,646 INFO L226 Difference]: Without dead ends: 709 [2019-10-15 01:09:18,649 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 [2019-10-15 01:09:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2019-10-15 01:09:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 704. [2019-10-15 01:09:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2019-10-15 01:09:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1095 transitions. [2019-10-15 01:09:18,685 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1095 transitions. Word has length 131 [2019-10-15 01:09:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:18,686 INFO L462 AbstractCegarLoop]: Abstraction has 704 states and 1095 transitions. [2019-10-15 01:09:18,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1095 transitions. [2019-10-15 01:09:18,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:09:18,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:18,689 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] [2019-10-15 01:09:18,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:18,898 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:18,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2078138463, now seen corresponding path program 1 times [2019-10-15 01:09:18,899 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:18,899 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781139177] [2019-10-15 01:09:18,899 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:18,900 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:18,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:19,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781139177] [2019-10-15 01:09:19,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114848425] [2019-10-15 01:09:19,014 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 [2019-10-15 01:09:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:19,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:19,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:19,872 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:20,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:20,427 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:20,427 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:20,427 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975071928] [2019-10-15 01:09:20,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:20,428 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:20,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:20,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:20,429 INFO L87 Difference]: Start difference. First operand 704 states and 1095 transitions. Second operand 14 states. [2019-10-15 01:09:20,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:20,772 INFO L93 Difference]: Finished difference Result 1257 states and 1980 transitions. [2019-10-15 01:09:20,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:09:20,772 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2019-10-15 01:09:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:20,778 INFO L225 Difference]: With dead ends: 1257 [2019-10-15 01:09:20,778 INFO L226 Difference]: Without dead ends: 719 [2019-10-15 01:09:20,781 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 [2019-10-15 01:09:20,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2019-10-15 01:09:20,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2019-10-15 01:09:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-10-15 01:09:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1100 transitions. [2019-10-15 01:09:20,809 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1100 transitions. Word has length 131 [2019-10-15 01:09:20,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:20,810 INFO L462 AbstractCegarLoop]: Abstraction has 706 states and 1100 transitions. [2019-10-15 01:09:20,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:09:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1100 transitions. [2019-10-15 01:09:20,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 01:09:20,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:20,812 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] [2019-10-15 01:09:21,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:21,022 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:21,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1522197471, now seen corresponding path program 1 times [2019-10-15 01:09:21,023 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:21,023 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157337485] [2019-10-15 01:09:21,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:21,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:21,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:21,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157337485] [2019-10-15 01:09:21,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179453556] [2019-10-15 01:09:21,198 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 [2019-10-15 01:09:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:22,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:22,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:22,226 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:22,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:22,698 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:22,698 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-15 01:09:22,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894274116] [2019-10-15 01:09:22,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:22,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:22,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:22,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:22,700 INFO L87 Difference]: Start difference. First operand 706 states and 1100 transitions. Second operand 11 states. [2019-10-15 01:09:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:22,932 INFO L93 Difference]: Finished difference Result 1253 states and 1979 transitions. [2019-10-15 01:09:22,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:22,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-15 01:09:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:22,937 INFO L225 Difference]: With dead ends: 1253 [2019-10-15 01:09:22,938 INFO L226 Difference]: Without dead ends: 715 [2019-10-15 01:09:22,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 251 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2019-10-15 01:09:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 708. [2019-10-15 01:09:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2019-10-15 01:09:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1105 transitions. [2019-10-15 01:09:22,968 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1105 transitions. Word has length 132 [2019-10-15 01:09:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:22,968 INFO L462 AbstractCegarLoop]: Abstraction has 708 states and 1105 transitions. [2019-10-15 01:09:22,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1105 transitions. [2019-10-15 01:09:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:22,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:22,971 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] [2019-10-15 01:09:23,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:23,180 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:23,181 INFO L82 PathProgramCache]: Analyzing trace with hash -158307460, now seen corresponding path program 1 times [2019-10-15 01:09:23,181 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:23,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604805989] [2019-10-15 01:09:23,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:23,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:23,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:23,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604805989] [2019-10-15 01:09:23,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681985136] [2019-10-15 01:09:23,299 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 [2019-10-15 01:09:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:24,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:24,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:24,088 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:24,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:24,386 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:24,386 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-15 01:09:24,386 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62599363] [2019-10-15 01:09:24,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:24,387 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:24,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:24,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:24,388 INFO L87 Difference]: Start difference. First operand 708 states and 1105 transitions. Second operand 9 states. [2019-10-15 01:09:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:24,518 INFO L93 Difference]: Finished difference Result 1347 states and 2139 transitions. [2019-10-15 01:09:24,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:24,518 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-15 01:09:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:24,523 INFO L225 Difference]: With dead ends: 1347 [2019-10-15 01:09:24,524 INFO L226 Difference]: Without dead ends: 717 [2019-10-15 01:09:24,527 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2019-10-15 01:09:24,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2019-10-15 01:09:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2019-10-15 01:09:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1113 transitions. [2019-10-15 01:09:24,553 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1113 transitions. Word has length 133 [2019-10-15 01:09:24,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:24,554 INFO L462 AbstractCegarLoop]: Abstraction has 715 states and 1113 transitions. [2019-10-15 01:09:24,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1113 transitions. [2019-10-15 01:09:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-15 01:09:24,556 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:24,557 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] [2019-10-15 01:09:24,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:24,766 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:24,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:24,767 INFO L82 PathProgramCache]: Analyzing trace with hash -493741801, now seen corresponding path program 1 times [2019-10-15 01:09:24,767 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:24,768 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532297755] [2019-10-15 01:09:24,768 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:24,768 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:24,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:24,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532297755] [2019-10-15 01:09:24,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702671705] [2019-10-15 01:09:24,874 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 [2019-10-15 01:09:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:25,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:25,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:25,742 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:25,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:26,026 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:26,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-15 01:09:26,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101993852] [2019-10-15 01:09:26,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:26,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:26,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:26,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:26,029 INFO L87 Difference]: Start difference. First operand 715 states and 1113 transitions. Second operand 8 states. [2019-10-15 01:09:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:26,137 INFO L93 Difference]: Finished difference Result 1361 states and 2151 transitions. [2019-10-15 01:09:26,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:09:26,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-10-15 01:09:26,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:26,142 INFO L225 Difference]: With dead ends: 1361 [2019-10-15 01:09:26,142 INFO L226 Difference]: Without dead ends: 724 [2019-10-15 01:09:26,145 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 [2019-10-15 01:09:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2019-10-15 01:09:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 719. [2019-10-15 01:09:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 719 states. [2019-10-15 01:09:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1119 transitions. [2019-10-15 01:09:26,169 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1119 transitions. Word has length 134 [2019-10-15 01:09:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:26,170 INFO L462 AbstractCegarLoop]: Abstraction has 719 states and 1119 transitions. [2019-10-15 01:09:26,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:26,170 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1119 transitions. [2019-10-15 01:09:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-15 01:09:26,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:26,173 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] [2019-10-15 01:09:26,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:26,382 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:26,382 INFO L82 PathProgramCache]: Analyzing trace with hash -822391147, now seen corresponding path program 1 times [2019-10-15 01:09:26,382 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:26,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570464695] [2019-10-15 01:09:26,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:26,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:26,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:26,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570464695] [2019-10-15 01:09:26,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503318607] [2019-10-15 01:09:26,506 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 [2019-10-15 01:09:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:27,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:09:27,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:09:27,327 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:27,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:27,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:09:28,168 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:28,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [4] total 19 [2019-10-15 01:09:28,169 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905032917] [2019-10-15 01:09:28,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:09:28,170 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:28,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:09:28,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:09:28,171 INFO L87 Difference]: Start difference. First operand 719 states and 1119 transitions. Second operand 17 states. [2019-10-15 01:09:28,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:28,604 INFO L93 Difference]: Finished difference Result 1279 states and 2017 transitions. [2019-10-15 01:09:28,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 01:09:28,606 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2019-10-15 01:09:28,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:28,612 INFO L225 Difference]: With dead ends: 1279 [2019-10-15 01:09:28,612 INFO L226 Difference]: Without dead ends: 741 [2019-10-15 01:09:28,615 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 [2019-10-15 01:09:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2019-10-15 01:09:28,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 722. [2019-10-15 01:09:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2019-10-15 01:09:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1122 transitions. [2019-10-15 01:09:28,639 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1122 transitions. Word has length 135 [2019-10-15 01:09:28,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:28,641 INFO L462 AbstractCegarLoop]: Abstraction has 722 states and 1122 transitions. [2019-10-15 01:09:28,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:09:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1122 transitions. [2019-10-15 01:09:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-15 01:09:28,643 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:28,643 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] [2019-10-15 01:09:28,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:28,852 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:28,853 INFO L82 PathProgramCache]: Analyzing trace with hash -931286111, now seen corresponding path program 1 times [2019-10-15 01:09:28,854 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:28,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172632603] [2019-10-15 01:09:28,854 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:28,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:28,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:28,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172632603] [2019-10-15 01:09:28,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143875621] [2019-10-15 01:09:28,952 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 [2019-10-15 01:09:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:29,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 01:09:29,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:09:29,809 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:30,022 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:30,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:30,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:30,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:30,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:09:30,193 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:30,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [4] total 12 [2019-10-15 01:09:30,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080962225] [2019-10-15 01:09:30,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 01:09:30,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:30,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 01:09:30,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:09:30,196 INFO L87 Difference]: Start difference. First operand 722 states and 1122 transitions. Second operand 10 states.