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_spec2_product27.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:10:56,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:10:56,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:10:56,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:10:56,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:10:56,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:10:56,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:10:56,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:10:56,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:10:56,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:10:56,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:10:56,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:10:56,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:10:56,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:10:56,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:10:56,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:10:56,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:10:56,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:10:56,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:10:56,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:10:56,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:10:56,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:10:56,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:10:56,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:10:56,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:10:56,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:10:56,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:10:56,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:10:56,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:10:56,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:10:56,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:10:56,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:10:56,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:10:56,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:10:56,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:10:56,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:10:56,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:10:56,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:10:56,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:10:56,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:10:56,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:10:56,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:10:56,439 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:10:56,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:10:56,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:10:56,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:10:56,441 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:10:56,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:10:56,441 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:10:56,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:10:56,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:10:56,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:10:56,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:10:56,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:10:56,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:10:56,443 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:10:56,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:10:56,443 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:10:56,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:10:56,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:10:56,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:10:56,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:10:56,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:10:56,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:10:56,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:10:56,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:10:56,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:10:56,445 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:10:56,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:10:56,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:10:56,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:10:56,795 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:10:56,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:10:56,814 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:10:56,815 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:10:56,816 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:10:56,816 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product27.cil.c [2019-10-13 21:10:56,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b994811ab/66bf625f7ba341d7ae86117eb8f9aba3/FLAG050603731 [2019-10-13 21:10:57,506 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:10:57,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product27.cil.c [2019-10-13 21:10:57,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b994811ab/66bf625f7ba341d7ae86117eb8f9aba3/FLAG050603731 [2019-10-13 21:10:57,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b994811ab/66bf625f7ba341d7ae86117eb8f9aba3 [2019-10-13 21:10:57,724 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:10:57,726 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:10:57,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:57,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:10:57,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:10:57,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:57" (1/1) ... [2019-10-13 21:10:57,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b5cac2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:57, skipping insertion in model container [2019-10-13 21:10:57,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:57" (1/1) ... [2019-10-13 21:10:57,743 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:10:57,816 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:10:58,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:58,701 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:10:58,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:58,939 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:10:58,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:58 WrapperNode [2019-10-13 21:10:58,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:58,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:10:58,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:10:58,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:10:58,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:58" (1/1) ... [2019-10-13 21:10:58,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:58" (1/1) ... [2019-10-13 21:10:59,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:58" (1/1) ... [2019-10-13 21:10:59,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:58" (1/1) ... [2019-10-13 21:10:59,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:58" (1/1) ... [2019-10-13 21:10:59,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:58" (1/1) ... [2019-10-13 21:10:59,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:58" (1/1) ... [2019-10-13 21:10:59,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:10:59,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:10:59,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:10:59,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:10:59,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:10:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:10:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:10:59,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:59,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:59,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:59,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:59,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:10:59,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:10:59,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:10:59,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2019-10-13 21:10:59,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2019-10-13 21:10:59,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2019-10-13 21:10:59,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2019-10-13 21:10:59,301 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:10:59,302 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:10:59,302 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:10:59,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:10:59,306 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:10:59,306 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:10:59,308 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:10:59,309 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:10:59,309 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:10:59,309 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:10:59,310 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:10:59,310 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:10:59,311 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:10:59,311 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:10:59,311 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:10:59,312 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:10:59,312 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:10:59,312 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:10:59,313 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:10:59,313 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:10:59,313 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:10:59,314 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:10:59,314 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:10:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:10:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:10:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:10:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:10:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:10:59,317 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:10:59,317 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:10:59,317 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:10:59,318 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:10:59,318 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:10:59,318 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:10:59,318 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:10:59,319 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:10:59,319 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:10:59,319 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:10:59,320 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:10:59,320 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:10:59,320 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:10:59,320 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:10:59,321 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:10:59,321 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:10:59,322 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:10:59,322 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:10:59,322 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:10:59,323 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:10:59,323 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:10:59,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:10:59,324 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:10:59,324 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:10:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:10:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:10:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:10:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:10:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:10:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:10:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:10:59,328 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:10:59,328 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:10:59,328 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:10:59,329 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:10:59,329 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:10:59,329 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:10:59,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:10:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:10:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:10:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:10:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:10:59,333 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:59,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:10:59,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:10:59,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:10:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:10:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:10:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:10:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:10:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:10:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:10:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:10:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:10:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:10:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:10:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2019-10-13 21:10:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2019-10-13 21:10:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2019-10-13 21:10:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2019-10-13 21:10:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:10:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:10:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:10:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:10:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:10:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:10:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:10:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:10:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:10:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:10:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:10:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:10:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:10:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:10:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:10:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:10:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:10:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:10:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:10:59,354 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:10:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:10:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:10:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:10:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:10:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:10:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:10:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:10:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:10:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:10:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:10:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:10:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:10:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:10:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:10:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:10:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:10:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:10:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:10:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:10:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:10:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:10:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:10:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:10:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:10:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:10:59,376 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:10:59,377 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:10:59,377 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:10:59,377 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:10:59,378 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:10:59,378 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:10:59,378 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:10:59,378 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:10:59,379 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:10:59,379 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:10:59,379 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:10:59,379 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:10:59,379 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:10:59,379 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:10:59,380 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:10:59,380 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:10:59,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:10:59,380 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:10:59,381 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:10:59,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:10:59,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:10:59,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:11:02,050 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:11:02,051 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:11:02,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:11:02 BoogieIcfgContainer [2019-10-13 21:11:02,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:11:02,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:11:02,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:11:02,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:11:02,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:10:57" (1/3) ... [2019-10-13 21:11:02,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645c209b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:11:02, skipping insertion in model container [2019-10-13 21:11:02,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:58" (2/3) ... [2019-10-13 21:11:02,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645c209b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:11:02, skipping insertion in model container [2019-10-13 21:11:02,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:11:02" (3/3) ... [2019-10-13 21:11:02,062 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product27.cil.c [2019-10-13 21:11:02,073 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:11:02,086 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:11:02,100 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:11:02,152 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:11:02,152 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:11:02,152 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:11:02,153 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:11:02,153 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:11:02,153 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:11:02,153 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:11:02,153 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:11:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states. [2019-10-13 21:11:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:11:02,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:02,235 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:02,237 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:02,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1054134663, now seen corresponding path program 1 times [2019-10-13 21:11:02,257 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:02,257 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367559191] [2019-10-13 21:11:02,258 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:02,258 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:02,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:03,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367559191] [2019-10-13 21:11:03,052 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:03,052 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:03,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12412328] [2019-10-13 21:11:03,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:03,064 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:03,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:03,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:03,082 INFO L87 Difference]: Start difference. First operand 786 states. Second operand 4 states. [2019-10-13 21:11:03,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:03,280 INFO L93 Difference]: Finished difference Result 1235 states and 1989 transitions. [2019-10-13 21:11:03,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:03,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-10-13 21:11:03,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:03,308 INFO L225 Difference]: With dead ends: 1235 [2019-10-13 21:11:03,308 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 21:11:03,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:03,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 21:11:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-13 21:11:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 21:11:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 996 transitions. [2019-10-13 21:11:03,426 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 996 transitions. Word has length 133 [2019-10-13 21:11:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:03,426 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 996 transitions. [2019-10-13 21:11:03,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 996 transitions. [2019-10-13 21:11:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 21:11:03,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:03,434 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:03,434 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:03,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:03,435 INFO L82 PathProgramCache]: Analyzing trace with hash 545110777, now seen corresponding path program 1 times [2019-10-13 21:11:03,435 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:03,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601677014] [2019-10-13 21:11:03,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:03,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:03,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:03,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601677014] [2019-10-13 21:11:03,655 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:03,655 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:03,656 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113313738] [2019-10-13 21:11:03,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:03,663 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:03,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:03,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:03,664 INFO L87 Difference]: Start difference. First operand 626 states and 996 transitions. Second operand 4 states. [2019-10-13 21:11:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:03,765 INFO L93 Difference]: Finished difference Result 1215 states and 1950 transitions. [2019-10-13 21:11:03,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:03,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2019-10-13 21:11:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:03,778 INFO L225 Difference]: With dead ends: 1215 [2019-10-13 21:11:03,779 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 21:11:03,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 21:11:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-13 21:11:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 21:11:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 995 transitions. [2019-10-13 21:11:03,841 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 995 transitions. Word has length 136 [2019-10-13 21:11:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:03,841 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 995 transitions. [2019-10-13 21:11:03,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 995 transitions. [2019-10-13 21:11:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 21:11:03,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:03,846 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:03,846 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:03,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:03,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1596840266, now seen corresponding path program 1 times [2019-10-13 21:11:03,847 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:03,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251834143] [2019-10-13 21:11:03,847 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:03,847 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:03,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:04,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251834143] [2019-10-13 21:11:04,073 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:04,074 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:04,074 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624087792] [2019-10-13 21:11:04,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:04,075 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:04,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:04,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:04,075 INFO L87 Difference]: Start difference. First operand 626 states and 995 transitions. Second operand 4 states. [2019-10-13 21:11:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:04,157 INFO L93 Difference]: Finished difference Result 1215 states and 1949 transitions. [2019-10-13 21:11:04,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:04,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-10-13 21:11:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:04,163 INFO L225 Difference]: With dead ends: 1215 [2019-10-13 21:11:04,164 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 21:11:04,167 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 21:11:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-13 21:11:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 21:11:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 994 transitions. [2019-10-13 21:11:04,202 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 994 transitions. Word has length 137 [2019-10-13 21:11:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:04,203 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 994 transitions. [2019-10-13 21:11:04,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 994 transitions. [2019-10-13 21:11:04,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 21:11:04,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:04,208 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:04,209 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash -794225131, now seen corresponding path program 1 times [2019-10-13 21:11:04,209 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:04,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552204504] [2019-10-13 21:11:04,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:04,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:04,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:04,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552204504] [2019-10-13 21:11:04,386 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:04,386 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:04,387 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525389890] [2019-10-13 21:11:04,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:04,388 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:04,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:04,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:04,389 INFO L87 Difference]: Start difference. First operand 626 states and 994 transitions. Second operand 4 states. [2019-10-13 21:11:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:04,453 INFO L93 Difference]: Finished difference Result 1215 states and 1948 transitions. [2019-10-13 21:11:04,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:04,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-10-13 21:11:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:04,462 INFO L225 Difference]: With dead ends: 1215 [2019-10-13 21:11:04,462 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 21:11:04,467 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 21:11:04,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-13 21:11:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 21:11:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 993 transitions. [2019-10-13 21:11:04,504 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 993 transitions. Word has length 138 [2019-10-13 21:11:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:04,505 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 993 transitions. [2019-10-13 21:11:04,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:04,505 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 993 transitions. [2019-10-13 21:11:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 21:11:04,511 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:04,511 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:04,511 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:04,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1095628306, now seen corresponding path program 1 times [2019-10-13 21:11:04,512 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:04,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876904587] [2019-10-13 21:11:04,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:04,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:04,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:04,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876904587] [2019-10-13 21:11:04,692 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:04,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:04,693 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213038053] [2019-10-13 21:11:04,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:04,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:04,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:04,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:04,695 INFO L87 Difference]: Start difference. First operand 626 states and 993 transitions. Second operand 4 states. [2019-10-13 21:11:04,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:04,759 INFO L93 Difference]: Finished difference Result 1215 states and 1947 transitions. [2019-10-13 21:11:04,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:04,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-10-13 21:11:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:04,773 INFO L225 Difference]: With dead ends: 1215 [2019-10-13 21:11:04,773 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 21:11:04,781 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 21:11:04,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-13 21:11:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 21:11:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 992 transitions. [2019-10-13 21:11:04,822 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 992 transitions. Word has length 139 [2019-10-13 21:11:04,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:04,822 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 992 transitions. [2019-10-13 21:11:04,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 992 transitions. [2019-10-13 21:11:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 21:11:04,832 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:04,832 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:04,833 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:04,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:04,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1964836559, now seen corresponding path program 1 times [2019-10-13 21:11:04,834 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:04,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469464154] [2019-10-13 21:11:04,838 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:04,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:04,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:05,168 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469464154] [2019-10-13 21:11:05,169 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:05,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 21:11:05,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748187125] [2019-10-13 21:11:05,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 21:11:05,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:05,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 21:11:05,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:11:05,172 INFO L87 Difference]: Start difference. First operand 626 states and 992 transitions. Second operand 10 states. [2019-10-13 21:11:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:05,341 INFO L93 Difference]: Finished difference Result 1173 states and 1867 transitions. [2019-10-13 21:11:05,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:11:05,342 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2019-10-13 21:11:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:05,350 INFO L225 Difference]: With dead ends: 1173 [2019-10-13 21:11:05,351 INFO L226 Difference]: Without dead ends: 635 [2019-10-13 21:11:05,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:11:05,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-10-13 21:11:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 633. [2019-10-13 21:11:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2019-10-13 21:11:05,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1001 transitions. [2019-10-13 21:11:05,390 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1001 transitions. Word has length 140 [2019-10-13 21:11:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:05,393 INFO L462 AbstractCegarLoop]: Abstraction has 633 states and 1001 transitions. [2019-10-13 21:11:05,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 21:11:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1001 transitions. [2019-10-13 21:11:05,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 21:11:05,398 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:05,398 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:05,398 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:05,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:05,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1270189552, now seen corresponding path program 1 times [2019-10-13 21:11:05,399 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:05,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639919736] [2019-10-13 21:11:05,399 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:05,399 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:05,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:05,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639919736] [2019-10-13 21:11:05,562 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:05,562 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:05,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810099581] [2019-10-13 21:11:05,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:05,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:05,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:05,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:05,564 INFO L87 Difference]: Start difference. First operand 633 states and 1001 transitions. Second operand 4 states. [2019-10-13 21:11:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:05,635 INFO L93 Difference]: Finished difference Result 1221 states and 1953 transitions. [2019-10-13 21:11:05,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:05,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-13 21:11:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:05,645 INFO L225 Difference]: With dead ends: 1221 [2019-10-13 21:11:05,645 INFO L226 Difference]: Without dead ends: 620 [2019-10-13 21:11:05,651 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-13 21:11:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-10-13 21:11:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 21:11:05,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 978 transitions. [2019-10-13 21:11:05,685 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 978 transitions. Word has length 140 [2019-10-13 21:11:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:05,685 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 978 transitions. [2019-10-13 21:11:05,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 978 transitions. [2019-10-13 21:11:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 21:11:05,690 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:05,690 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:05,690 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:05,691 INFO L82 PathProgramCache]: Analyzing trace with hash -730531008, now seen corresponding path program 1 times [2019-10-13 21:11:05,692 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:05,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55218624] [2019-10-13 21:11:05,692 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:05,692 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:05,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:05,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55218624] [2019-10-13 21:11:05,928 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:05,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:05,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844260982] [2019-10-13 21:11:05,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:05,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:05,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:05,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:05,930 INFO L87 Difference]: Start difference. First operand 620 states and 978 transitions. Second operand 6 states. [2019-10-13 21:11:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:06,185 INFO L93 Difference]: Finished difference Result 1161 states and 1845 transitions. [2019-10-13 21:11:06,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:06,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-13 21:11:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:06,191 INFO L225 Difference]: With dead ends: 1161 [2019-10-13 21:11:06,191 INFO L226 Difference]: Without dead ends: 620 [2019-10-13 21:11:06,195 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-13 21:11:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-10-13 21:11:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 21:11:06,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 974 transitions. [2019-10-13 21:11:06,222 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 974 transitions. Word has length 141 [2019-10-13 21:11:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:06,223 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 974 transitions. [2019-10-13 21:11:06,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 974 transitions. [2019-10-13 21:11:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 21:11:06,227 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:06,227 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:06,228 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:06,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1761880204, now seen corresponding path program 1 times [2019-10-13 21:11:06,228 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:06,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330005873] [2019-10-13 21:11:06,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:06,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:06,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:06,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330005873] [2019-10-13 21:11:06,377 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:06,377 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:06,377 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098158218] [2019-10-13 21:11:06,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:06,378 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:06,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:06,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:06,379 INFO L87 Difference]: Start difference. First operand 620 states and 974 transitions. Second operand 6 states. [2019-10-13 21:11:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:06,603 INFO L93 Difference]: Finished difference Result 1161 states and 1841 transitions. [2019-10-13 21:11:06,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:06,603 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-10-13 21:11:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:06,609 INFO L225 Difference]: With dead ends: 1161 [2019-10-13 21:11:06,609 INFO L226 Difference]: Without dead ends: 620 [2019-10-13 21:11:06,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-13 21:11:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-10-13 21:11:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 21:11:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 970 transitions. [2019-10-13 21:11:06,636 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 970 transitions. Word has length 142 [2019-10-13 21:11:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:06,636 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 970 transitions. [2019-10-13 21:11:06,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 970 transitions. [2019-10-13 21:11:06,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 21:11:06,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:06,641 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:06,641 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:06,642 INFO L82 PathProgramCache]: Analyzing trace with hash 333743557, now seen corresponding path program 1 times [2019-10-13 21:11:06,642 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:06,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666480888] [2019-10-13 21:11:06,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:06,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:06,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:06,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666480888] [2019-10-13 21:11:06,794 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:06,794 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:06,795 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802723165] [2019-10-13 21:11:06,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:06,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:06,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:06,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:06,796 INFO L87 Difference]: Start difference. First operand 620 states and 970 transitions. Second operand 6 states. [2019-10-13 21:11:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:06,981 INFO L93 Difference]: Finished difference Result 1161 states and 1837 transitions. [2019-10-13 21:11:06,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:06,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-10-13 21:11:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:06,986 INFO L225 Difference]: With dead ends: 1161 [2019-10-13 21:11:06,987 INFO L226 Difference]: Without dead ends: 620 [2019-10-13 21:11:06,990 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-13 21:11:07,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-10-13 21:11:07,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 21:11:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 966 transitions. [2019-10-13 21:11:07,016 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 966 transitions. Word has length 143 [2019-10-13 21:11:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:07,016 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 966 transitions. [2019-10-13 21:11:07,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 966 transitions. [2019-10-13 21:11:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 21:11:07,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:07,022 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:07,022 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:07,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:07,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1388216901, now seen corresponding path program 1 times [2019-10-13 21:11:07,023 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:07,023 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71383267] [2019-10-13 21:11:07,023 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:07,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:07,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:07,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71383267] [2019-10-13 21:11:07,214 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:07,214 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:07,215 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342869861] [2019-10-13 21:11:07,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:07,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:07,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:07,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:07,216 INFO L87 Difference]: Start difference. First operand 620 states and 966 transitions. Second operand 7 states. [2019-10-13 21:11:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:07,299 INFO L93 Difference]: Finished difference Result 1161 states and 1833 transitions. [2019-10-13 21:11:07,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:07,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-10-13 21:11:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:07,305 INFO L225 Difference]: With dead ends: 1161 [2019-10-13 21:11:07,305 INFO L226 Difference]: Without dead ends: 599 [2019-10-13 21:11:07,308 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-10-13 21:11:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2019-10-13 21:11:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-10-13 21:11:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 932 transitions. [2019-10-13 21:11:07,329 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 932 transitions. Word has length 143 [2019-10-13 21:11:07,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:07,329 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 932 transitions. [2019-10-13 21:11:07,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 932 transitions. [2019-10-13 21:11:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 21:11:07,333 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:07,334 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:07,334 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:07,334 INFO L82 PathProgramCache]: Analyzing trace with hash 581281177, now seen corresponding path program 1 times [2019-10-13 21:11:07,335 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:07,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589481447] [2019-10-13 21:11:07,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:07,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:07,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:07,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589481447] [2019-10-13 21:11:07,465 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:07,465 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:07,465 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002785896] [2019-10-13 21:11:07,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:07,466 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:07,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:07,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:07,467 INFO L87 Difference]: Start difference. First operand 599 states and 932 transitions. Second operand 6 states. [2019-10-13 21:11:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:07,565 INFO L93 Difference]: Finished difference Result 1140 states and 1799 transitions. [2019-10-13 21:11:07,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:07,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-10-13 21:11:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:07,570 INFO L225 Difference]: With dead ends: 1140 [2019-10-13 21:11:07,570 INFO L226 Difference]: Without dead ends: 599 [2019-10-13 21:11:07,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-10-13 21:11:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2019-10-13 21:11:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-10-13 21:11:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 931 transitions. [2019-10-13 21:11:07,594 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 931 transitions. Word has length 144 [2019-10-13 21:11:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:07,594 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 931 transitions. [2019-10-13 21:11:07,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 931 transitions. [2019-10-13 21:11:07,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 21:11:07,598 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:07,599 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:07,599 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:07,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:07,599 INFO L82 PathProgramCache]: Analyzing trace with hash -627276726, now seen corresponding path program 1 times [2019-10-13 21:11:07,600 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:07,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654281565] [2019-10-13 21:11:07,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:07,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:07,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:07,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654281565] [2019-10-13 21:11:07,727 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:07,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:07,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822324146] [2019-10-13 21:11:07,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:07,728 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:07,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:07,729 INFO L87 Difference]: Start difference. First operand 599 states and 931 transitions. Second operand 6 states. [2019-10-13 21:11:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:07,821 INFO L93 Difference]: Finished difference Result 1140 states and 1798 transitions. [2019-10-13 21:11:07,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:07,822 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-10-13 21:11:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:07,826 INFO L225 Difference]: With dead ends: 1140 [2019-10-13 21:11:07,826 INFO L226 Difference]: Without dead ends: 599 [2019-10-13 21:11:07,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-10-13 21:11:07,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2019-10-13 21:11:07,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-10-13 21:11:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 930 transitions. [2019-10-13 21:11:07,849 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 930 transitions. Word has length 145 [2019-10-13 21:11:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:07,849 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 930 transitions. [2019-10-13 21:11:07,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 930 transitions. [2019-10-13 21:11:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 21:11:07,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:07,854 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:07,854 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:07,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:07,855 INFO L82 PathProgramCache]: Analyzing trace with hash 269844414, now seen corresponding path program 1 times [2019-10-13 21:11:07,855 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:07,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363237623] [2019-10-13 21:11:07,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:07,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:07,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:08,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363237623] [2019-10-13 21:11:08,092 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:08,092 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 21:11:08,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319063128] [2019-10-13 21:11:08,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 21:11:08,093 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:08,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 21:11:08,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:08,094 INFO L87 Difference]: Start difference. First operand 599 states and 930 transitions. Second operand 12 states. [2019-10-13 21:11:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:08,275 INFO L93 Difference]: Finished difference Result 1141 states and 1797 transitions. [2019-10-13 21:11:08,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:11:08,275 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2019-10-13 21:11:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:08,280 INFO L225 Difference]: With dead ends: 1141 [2019-10-13 21:11:08,280 INFO L226 Difference]: Without dead ends: 599 [2019-10-13 21:11:08,284 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:11:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-10-13 21:11:08,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2019-10-13 21:11:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-10-13 21:11:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 929 transitions. [2019-10-13 21:11:08,307 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 929 transitions. Word has length 146 [2019-10-13 21:11:08,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:08,309 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 929 transitions. [2019-10-13 21:11:08,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 21:11:08,309 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 929 transitions. [2019-10-13 21:11:08,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 21:11:08,315 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:08,315 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:08,315 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:08,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1889822343, now seen corresponding path program 1 times [2019-10-13 21:11:08,316 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:08,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142467449] [2019-10-13 21:11:08,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:08,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:08,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:08,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142467449] [2019-10-13 21:11:08,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73847934] [2019-10-13 21:11:08,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:09,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 2771 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:11:09,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:09,220 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:10,072 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:11:10,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-10-13 21:11:10,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493243572] [2019-10-13 21:11:10,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:10,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:10,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:10,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:11:10,074 INFO L87 Difference]: Start difference. First operand 599 states and 929 transitions. Second operand 5 states. [2019-10-13 21:11:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:11,067 INFO L93 Difference]: Finished difference Result 1140 states and 1822 transitions. [2019-10-13 21:11:11,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:11,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-10-13 21:11:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:11,075 INFO L225 Difference]: With dead ends: 1140 [2019-10-13 21:11:11,075 INFO L226 Difference]: Without dead ends: 607 [2019-10-13 21:11:11,080 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 281 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:11:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-13 21:11:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2019-10-13 21:11:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-13 21:11:11,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 942 transitions. [2019-10-13 21:11:11,113 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 942 transitions. Word has length 147 [2019-10-13 21:11:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:11,113 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 942 transitions. [2019-10-13 21:11:11,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:11,114 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 942 transitions. [2019-10-13 21:11:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 21:11:11,118 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:11,118 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:11,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:11,334 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:11,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:11,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2076963317, now seen corresponding path program 1 times [2019-10-13 21:11:11,335 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:11,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174035385] [2019-10-13 21:11:11,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:11,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:11,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:11,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174035385] [2019-10-13 21:11:11,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245585524] [2019-10-13 21:11:11,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:12,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 2773 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:11:12,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:12,395 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:13,043 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:11:13,044 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-10-13 21:11:13,044 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115969689] [2019-10-13 21:11:13,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:13,045 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:13,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:13,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:11:13,046 INFO L87 Difference]: Start difference. First operand 607 states and 942 transitions. Second operand 5 states. [2019-10-13 21:11:14,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:14,150 INFO L93 Difference]: Finished difference Result 1156 states and 1845 transitions. [2019-10-13 21:11:14,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:14,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2019-10-13 21:11:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:14,157 INFO L225 Difference]: With dead ends: 1156 [2019-10-13 21:11:14,157 INFO L226 Difference]: Without dead ends: 615 [2019-10-13 21:11:14,161 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 285 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:11:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2019-10-13 21:11:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 615. [2019-10-13 21:11:14,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2019-10-13 21:11:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 955 transitions. [2019-10-13 21:11:14,195 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 955 transitions. Word has length 149 [2019-10-13 21:11:14,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:14,195 INFO L462 AbstractCegarLoop]: Abstraction has 615 states and 955 transitions. [2019-10-13 21:11:14,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 955 transitions. [2019-10-13 21:11:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-13 21:11:14,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:14,200 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:14,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:14,408 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:14,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:14,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1312607033, now seen corresponding path program 1 times [2019-10-13 21:11:14,409 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:14,409 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297315693] [2019-10-13 21:11:14,409 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:14,409 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:14,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:14,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297315693] [2019-10-13 21:11:14,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527201606] [2019-10-13 21:11:14,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:15,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 2775 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:11:15,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:15,159 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:15,839 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:11:15,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-10-13 21:11:15,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735717661] [2019-10-13 21:11:15,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:15,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:15,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:15,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:11:15,841 INFO L87 Difference]: Start difference. First operand 615 states and 955 transitions. Second operand 5 states. [2019-10-13 21:11:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:16,741 INFO L93 Difference]: Finished difference Result 1172 states and 1868 transitions. [2019-10-13 21:11:16,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:16,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2019-10-13 21:11:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:16,747 INFO L225 Difference]: With dead ends: 1172 [2019-10-13 21:11:16,748 INFO L226 Difference]: Without dead ends: 623 [2019-10-13 21:11:16,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:11:16,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-13 21:11:16,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-10-13 21:11:16,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-13 21:11:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 968 transitions. [2019-10-13 21:11:16,772 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 968 transitions. Word has length 151 [2019-10-13 21:11:16,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:16,772 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 968 transitions. [2019-10-13 21:11:16,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 968 transitions. [2019-10-13 21:11:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:11:16,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:16,777 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:16,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:16,985 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:16,985 INFO L82 PathProgramCache]: Analyzing trace with hash -941872595, now seen corresponding path program 1 times [2019-10-13 21:11:16,986 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:16,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134707157] [2019-10-13 21:11:16,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:17,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134707157] [2019-10-13 21:11:17,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138108721] [2019-10-13 21:11:17,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:17,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:11:17,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:17,880 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:18,771 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:11:18,771 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 12 [2019-10-13 21:11:18,771 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668068599] [2019-10-13 21:11:18,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:18,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:18,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:18,775 INFO L87 Difference]: Start difference. First operand 623 states and 968 transitions. Second operand 5 states. [2019-10-13 21:11:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:19,692 INFO L93 Difference]: Finished difference Result 1188 states and 1891 transitions. [2019-10-13 21:11:19,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:19,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-10-13 21:11:19,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:19,699 INFO L225 Difference]: With dead ends: 1188 [2019-10-13 21:11:19,699 INFO L226 Difference]: Without dead ends: 631 [2019-10-13 21:11:19,702 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 293 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:11:19,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2019-10-13 21:11:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2019-10-13 21:11:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2019-10-13 21:11:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 981 transitions. [2019-10-13 21:11:19,723 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 981 transitions. Word has length 153 [2019-10-13 21:11:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:19,725 INFO L462 AbstractCegarLoop]: Abstraction has 631 states and 981 transitions. [2019-10-13 21:11:19,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 981 transitions. [2019-10-13 21:11:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 21:11:19,729 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:19,729 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:19,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:19,937 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:19,937 INFO L82 PathProgramCache]: Analyzing trace with hash 807721721, now seen corresponding path program 1 times [2019-10-13 21:11:19,937 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:19,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542272701] [2019-10-13 21:11:19,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:19,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:19,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:11:20,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542272701] [2019-10-13 21:11:20,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334626882] [2019-10-13 21:11:20,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:20,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 2779 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:11:20,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:11:20,910 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:11:21,299 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:21,299 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [11] total 18 [2019-10-13 21:11:21,299 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167428887] [2019-10-13 21:11:21,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:11:21,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:21,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:11:21,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:11:21,306 INFO L87 Difference]: Start difference. First operand 631 states and 981 transitions. Second operand 9 states. [2019-10-13 21:11:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:22,673 INFO L93 Difference]: Finished difference Result 676 states and 1041 transitions. [2019-10-13 21:11:22,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:22,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 155 [2019-10-13 21:11:22,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:22,683 INFO L225 Difference]: With dead ends: 676 [2019-10-13 21:11:22,683 INFO L226 Difference]: Without dead ends: 659 [2019-10-13 21:11:22,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 313 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2019-10-13 21:11:22,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2019-10-13 21:11:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 645. [2019-10-13 21:11:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-13 21:11:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1000 transitions. [2019-10-13 21:11:22,710 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1000 transitions. Word has length 155 [2019-10-13 21:11:22,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:22,713 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1000 transitions. [2019-10-13 21:11:22,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:11:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1000 transitions. [2019-10-13 21:11:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:11:22,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:22,718 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:22,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:22,925 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:22,926 INFO L82 PathProgramCache]: Analyzing trace with hash -208367116, now seen corresponding path program 1 times [2019-10-13 21:11:22,926 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:22,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815591347] [2019-10-13 21:11:22,927 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:22,928 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:22,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:11:23,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815591347] [2019-10-13 21:11:23,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387680838] [2019-10-13 21:11:23,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:23,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 2795 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:11:23,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:11:23,855 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:11:24,134 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:24,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [11] total 14 [2019-10-13 21:11:24,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540128877] [2019-10-13 21:11:24,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:24,136 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:24,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:11:24,137 INFO L87 Difference]: Start difference. First operand 645 states and 1000 transitions. Second operand 5 states. [2019-10-13 21:11:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:24,181 INFO L93 Difference]: Finished difference Result 662 states and 1020 transitions. [2019-10-13 21:11:24,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:24,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-10-13 21:11:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:24,187 INFO L225 Difference]: With dead ends: 662 [2019-10-13 21:11:24,187 INFO L226 Difference]: Without dead ends: 645 [2019-10-13 21:11:24,188 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 329 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:11:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-13 21:11:24,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-13 21:11:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-13 21:11:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 998 transitions. [2019-10-13 21:11:24,212 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 998 transitions. Word has length 161 [2019-10-13 21:11:24,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:24,212 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 998 transitions. [2019-10-13 21:11:24,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 998 transitions. [2019-10-13 21:11:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:11:24,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:24,218 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:24,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:24,435 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:24,435 INFO L82 PathProgramCache]: Analyzing trace with hash 107103986, now seen corresponding path program 1 times [2019-10-13 21:11:24,435 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:24,436 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134209433] [2019-10-13 21:11:24,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:24,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:24,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 21:11:24,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134209433] [2019-10-13 21:11:24,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945046276] [2019-10-13 21:11:24,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:25,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 2845 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 21:11:25,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:11:25,420 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:11:25,848 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:25,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [11] total 18 [2019-10-13 21:11:25,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935410005] [2019-10-13 21:11:25,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:11:25,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:25,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:11:25,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:11:25,850 INFO L87 Difference]: Start difference. First operand 645 states and 998 transitions. Second operand 9 states.