java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:09:20,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:09:20,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:09:20,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:09:20,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:09:20,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:09:20,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:09:20,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:09:20,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:09:20,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:09:20,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:09:20,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:09:20,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:09:20,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:09:20,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:09:20,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:09:20,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:09:20,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:09:20,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:09:20,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:09:20,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:09:20,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:09:20,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:09:20,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:09:20,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:09:20,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:09:20,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:09:20,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:09:20,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:09:20,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:09:20,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:09:20,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:09:20,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:09:20,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:09:20,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:09:20,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:09:20,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:09:20,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:09:20,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:09:20,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:09:20,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:09:20,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:09:20,648 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:09:20,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:09:20,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:09:20,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:09:20,650 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:09:20,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:09:20,651 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:09:20,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:09:20,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:09:20,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:09:20,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:09:20,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:09:20,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:09:20,652 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:09:20,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:09:20,652 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:09:20,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:09:20,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:09:20,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:09:20,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:09:20,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:09:20,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:09:20,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:09:20,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:09:20,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:09:20,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:09:20,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:09:20,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:09:20,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:09:20,936 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:09:20,950 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:09:20,953 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:09:20,955 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:09:20,955 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:09:20,956 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product32.cil.c [2019-10-15 01:09:21,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c01c8ec3/9b3cfbf99415442d9b629ec511fe9c5b/FLAG8c1e5a19c [2019-10-15 01:09:21,720 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:09:21,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product32.cil.c [2019-10-15 01:09:21,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c01c8ec3/9b3cfbf99415442d9b629ec511fe9c5b/FLAG8c1e5a19c [2019-10-15 01:09:21,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c01c8ec3/9b3cfbf99415442d9b629ec511fe9c5b [2019-10-15 01:09:21,907 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:09:21,908 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:09:21,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:09:21,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:09:21,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:09:21,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:09:21" (1/1) ... [2019-10-15 01:09:21,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b70ff60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:21, skipping insertion in model container [2019-10-15 01:09:21,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:09:21" (1/1) ... [2019-10-15 01:09:21,924 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:09:22,004 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:09:22,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:09:22,763 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:09:22,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:09:23,080 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:09:23,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23 WrapperNode [2019-10-15 01:09:23,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:09:23,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:09:23,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:09:23,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:09:23,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:09:23,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:09:23,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:09:23,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:09:23,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:09:23,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:09:23,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:09:23,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:09:23,395 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:09:23,395 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:09:23,397 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:09:23,397 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:09:23,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:09:23,397 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:09:23,398 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:09:23,398 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:09:23,398 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:09:23,399 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:09:23,400 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:09:23,400 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 01:09:23,400 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:09:23,403 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:09:23,403 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:09:23,404 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:09:23,404 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:09:23,404 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:09:23,405 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:09:23,405 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:09:23,405 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:09:23,405 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:09:23,405 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:09:23,406 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 01:09:23,406 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:09:23,406 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:09:23,406 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:09:23,406 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:09:23,407 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 01:09:23,407 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:09:23,407 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:09:23,407 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:09:23,407 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-15 01:09:23,407 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:09:23,408 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-15 01:09:23,408 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:09:23,408 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:09:23,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 01:09:23,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 01:09:23,409 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:09:23,409 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:09:23,409 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:09:23,409 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:09:23,410 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:09:23,410 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:09:23,410 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:09:23,410 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:09:23,410 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:09:23,411 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:09:23,411 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:09:23,411 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:09:23,411 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:09:23,411 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:09:23,411 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:09:23,412 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:09:23,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:09:23,413 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:09:23,413 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:09:23,413 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:09:23,413 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:09:23,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:09:23,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:09:23,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:09:23,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:09:23,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:09:23,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:09:23,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:09:23,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:09:23,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:09:23,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:09:23,416 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:09:23,417 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:09:23,417 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:09:23,417 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:09:23,417 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:09:23,417 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:09:23,418 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:09:23,418 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:09:23,419 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:09:23,419 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:09:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:09:23,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:09:23,420 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:09:23,421 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:09:23,422 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:09:23,422 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:09:23,422 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:09:23,422 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:09:23,423 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:09:23,423 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:09:23,423 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:09:23,423 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:09:23,423 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:09:23,423 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:09:23,424 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:09:23,424 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:09:23,424 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:09:23,424 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:09:23,424 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:09:23,424 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:09:23,425 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:09:23,425 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:09:23,425 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:09:23,425 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:09:23,425 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:09:23,425 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:09:23,426 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:09:23,426 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:09:23,426 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:09:23,426 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 01:09:23,426 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 01:09:23,426 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:09:23,426 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:09:23,427 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 01:09:23,427 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:09:23,427 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:09:23,428 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:09:23,428 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:09:23,428 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:09:23,428 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:09:23,428 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 01:09:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:09:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:09:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:09:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 01:09:23,430 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:09:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:09:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:09:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-15 01:09:23,431 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:09:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-15 01:09:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:09:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:09:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:09:23,436 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:09:23,436 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:09:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:09:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:09:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:09:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:09:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:09:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:09:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:09:23,444 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:09:23,445 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:09:23,445 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:09:23,445 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:09:23,445 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:09:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:09:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:09:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:09:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:09:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:09:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:09:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:09:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:09:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:09:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:09:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:09:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:09:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:09:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:09:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:09:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:09:23,449 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:09:23,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:09:23,449 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:09:23,449 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:09:23,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:09:23,449 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:09:23,449 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:09:23,449 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:09:23,450 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:09:23,450 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:09:23,450 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:09:23,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:09:23,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:09:23,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:09:26,019 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:09:26,020 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:09:26,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:09:26 BoogieIcfgContainer [2019-10-15 01:09:26,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:09:26,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:09:26,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:09:26,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:09:26,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:09:21" (1/3) ... [2019-10-15 01:09:26,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac63def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:09:26, skipping insertion in model container [2019-10-15 01:09:26,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (2/3) ... [2019-10-15 01:09:26,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac63def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:09:26, skipping insertion in model container [2019-10-15 01:09:26,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:09:26" (3/3) ... [2019-10-15 01:09:26,032 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product32.cil.c [2019-10-15 01:09:26,042 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:09:26,054 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:09:26,066 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:09:26,116 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:09:26,116 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:09:26,116 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:09:26,116 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:09:26,116 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:09:26,116 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:09:26,117 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:09:26,117 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:09:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states. [2019-10-15 01:09:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:09:26,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:26,197 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:26,200 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:26,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:26,208 INFO L82 PathProgramCache]: Analyzing trace with hash 56445338, now seen corresponding path program 1 times [2019-10-15 01:09:26,221 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:26,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986057337] [2019-10-15 01:09:26,222 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:26,222 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:26,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:26,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986057337] [2019-10-15 01:09:26,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731400113] [2019-10-15 01:09:26,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:27,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:09:27,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:27,810 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:28,012 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:28,012 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:09:28,012 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764311518] [2019-10-15 01:09:28,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:09:28,023 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:28,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:09:28,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:09:28,041 INFO L87 Difference]: Start difference. First operand 834 states. Second operand 2 states. [2019-10-15 01:09:28,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:28,166 INFO L93 Difference]: Finished difference Result 710 states and 1117 transitions. [2019-10-15 01:09:28,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:09:28,170 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-15 01:09:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:28,222 INFO L225 Difference]: With dead ends: 710 [2019-10-15 01:09:28,222 INFO L226 Difference]: Without dead ends: 673 [2019-10-15 01:09:28,230 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:09:28,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-10-15 01:09:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-10-15 01:09:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-10-15 01:09:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1062 transitions. [2019-10-15 01:09:28,365 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1062 transitions. Word has length 116 [2019-10-15 01:09:28,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:28,371 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 1062 transitions. [2019-10-15 01:09:28,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:09:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1062 transitions. [2019-10-15 01:09:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:09:28,391 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:28,392 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:28,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:28,610 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:28,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1775152457, now seen corresponding path program 1 times [2019-10-15 01:09:28,612 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:28,612 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002697557] [2019-10-15 01:09:28,613 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:28,613 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:28,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:28,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002697557] [2019-10-15 01:09:28,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12248352] [2019-10-15 01:09:28,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:29,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:29,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:29,542 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:29,821 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:29,821 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:29,821 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974417550] [2019-10-15 01:09:29,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:29,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:29,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:29,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:29,825 INFO L87 Difference]: Start difference. First operand 673 states and 1062 transitions. Second operand 4 states. [2019-10-15 01:09:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:29,967 INFO L93 Difference]: Finished difference Result 1318 states and 2097 transitions. [2019-10-15 01:09:29,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:29,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-15 01:09:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:29,979 INFO L225 Difference]: With dead ends: 1318 [2019-10-15 01:09:29,979 INFO L226 Difference]: Without dead ends: 673 [2019-10-15 01:09:29,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:29,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-10-15 01:09:30,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-10-15 01:09:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-10-15 01:09:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1061 transitions. [2019-10-15 01:09:30,041 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1061 transitions. Word has length 118 [2019-10-15 01:09:30,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:30,041 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 1061 transitions. [2019-10-15 01:09:30,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:30,041 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1061 transitions. [2019-10-15 01:09:30,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 01:09:30,044 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:30,044 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:30,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:30,258 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:30,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:30,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1168672533, now seen corresponding path program 1 times [2019-10-15 01:09:30,259 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:30,260 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177065338] [2019-10-15 01:09:30,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:30,261 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:30,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:30,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177065338] [2019-10-15 01:09:30,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34341308] [2019-10-15 01:09:30,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:31,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:31,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:31,151 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:31,355 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:31,356 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:31,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582156267] [2019-10-15 01:09:31,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:31,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:31,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:31,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:31,358 INFO L87 Difference]: Start difference. First operand 673 states and 1061 transitions. Second operand 4 states. [2019-10-15 01:09:31,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:31,445 INFO L93 Difference]: Finished difference Result 1318 states and 2095 transitions. [2019-10-15 01:09:31,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:31,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-15 01:09:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:31,453 INFO L225 Difference]: With dead ends: 1318 [2019-10-15 01:09:31,453 INFO L226 Difference]: Without dead ends: 673 [2019-10-15 01:09:31,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-10-15 01:09:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-10-15 01:09:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-10-15 01:09:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1060 transitions. [2019-10-15 01:09:31,487 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1060 transitions. Word has length 120 [2019-10-15 01:09:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:31,487 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 1060 transitions. [2019-10-15 01:09:31,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1060 transitions. [2019-10-15 01:09:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 01:09:31,490 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:31,491 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:31,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:31,701 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:31,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:31,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2048084753, now seen corresponding path program 1 times [2019-10-15 01:09:31,701 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:31,702 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964521832] [2019-10-15 01:09:31,702 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:31,702 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:31,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:31,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964521832] [2019-10-15 01:09:31,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879947852] [2019-10-15 01:09:31,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:32,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:32,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:32,554 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:32,770 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:32,770 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:32,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322350565] [2019-10-15 01:09:32,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:32,771 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:32,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:32,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:32,772 INFO L87 Difference]: Start difference. First operand 673 states and 1060 transitions. Second operand 4 states. [2019-10-15 01:09:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:32,868 INFO L93 Difference]: Finished difference Result 1325 states and 2102 transitions. [2019-10-15 01:09:32,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:32,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-15 01:09:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:32,874 INFO L225 Difference]: With dead ends: 1325 [2019-10-15 01:09:32,874 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 01:09:32,878 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 01:09:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 01:09:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 01:09:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1072 transitions. [2019-10-15 01:09:32,906 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1072 transitions. Word has length 122 [2019-10-15 01:09:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:32,907 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1072 transitions. [2019-10-15 01:09:32,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1072 transitions. [2019-10-15 01:09:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:09:32,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:32,913 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:33,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:33,124 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:33,124 INFO L82 PathProgramCache]: Analyzing trace with hash -712971393, now seen corresponding path program 1 times [2019-10-15 01:09:33,124 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:33,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400707816] [2019-10-15 01:09:33,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:33,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:33,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:33,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400707816] [2019-10-15 01:09:33,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330026625] [2019-10-15 01:09:33,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:33,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:33,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:33,979 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:34,173 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:34,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:34,174 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007397577] [2019-10-15 01:09:34,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:34,175 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:34,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:34,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:34,175 INFO L87 Difference]: Start difference. First operand 682 states and 1072 transitions. Second operand 4 states. [2019-10-15 01:09:34,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:34,312 INFO L93 Difference]: Finished difference Result 1327 states and 2103 transitions. [2019-10-15 01:09:34,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:34,313 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-15 01:09:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:34,320 INFO L225 Difference]: With dead ends: 1327 [2019-10-15 01:09:34,320 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 01:09:34,325 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 01:09:34,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 01:09:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 01:09:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1071 transitions. [2019-10-15 01:09:34,349 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1071 transitions. Word has length 123 [2019-10-15 01:09:34,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:34,350 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1071 transitions. [2019-10-15 01:09:34,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:34,350 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1071 transitions. [2019-10-15 01:09:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 01:09:34,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:34,355 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:34,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:34,564 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:34,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:34,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1947833131, now seen corresponding path program 1 times [2019-10-15 01:09:34,565 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:34,566 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440383012] [2019-10-15 01:09:34,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:34,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:34,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:34,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440383012] [2019-10-15 01:09:34,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723241195] [2019-10-15 01:09:34,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:35,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:35,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:35,362 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:35,583 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:35,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:35,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186533827] [2019-10-15 01:09:35,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:35,586 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:35,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:35,587 INFO L87 Difference]: Start difference. First operand 682 states and 1071 transitions. Second operand 4 states. [2019-10-15 01:09:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:35,672 INFO L93 Difference]: Finished difference Result 1327 states and 2102 transitions. [2019-10-15 01:09:35,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:35,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-15 01:09:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:35,680 INFO L225 Difference]: With dead ends: 1327 [2019-10-15 01:09:35,680 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 01:09:35,686 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 01:09:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 01:09:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 01:09:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1070 transitions. [2019-10-15 01:09:35,719 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1070 transitions. Word has length 124 [2019-10-15 01:09:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:35,719 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1070 transitions. [2019-10-15 01:09:35,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1070 transitions. [2019-10-15 01:09:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:09:35,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:35,724 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:35,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:35,933 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:35,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:35,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1179658819, now seen corresponding path program 1 times [2019-10-15 01:09:35,934 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:35,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032979356] [2019-10-15 01:09:35,935 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:35,935 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:35,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:36,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032979356] [2019-10-15 01:09:36,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289538924] [2019-10-15 01:09:36,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:36,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:36,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:36,871 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:37,100 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:37,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:37,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211352493] [2019-10-15 01:09:37,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:37,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:37,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:37,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:37,102 INFO L87 Difference]: Start difference. First operand 682 states and 1070 transitions. Second operand 4 states. [2019-10-15 01:09:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:37,286 INFO L93 Difference]: Finished difference Result 1326 states and 2102 transitions. [2019-10-15 01:09:37,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:37,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-15 01:09:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:37,293 INFO L225 Difference]: With dead ends: 1326 [2019-10-15 01:09:37,294 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 01:09:37,298 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:37,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 01:09:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 01:09:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 01:09:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1065 transitions. [2019-10-15 01:09:37,324 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1065 transitions. Word has length 125 [2019-10-15 01:09:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:37,325 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1065 transitions. [2019-10-15 01:09:37,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1065 transitions. [2019-10-15 01:09:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 01:09:37,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:37,327 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:37,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:37,537 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:37,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:37,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1513989099, now seen corresponding path program 1 times [2019-10-15 01:09:37,538 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:37,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438519537] [2019-10-15 01:09:37,539 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:37,539 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:37,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:37,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438519537] [2019-10-15 01:09:37,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3374084] [2019-10-15 01:09:37,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:38,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:38,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:38,491 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:38,704 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:38,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:38,704 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171056330] [2019-10-15 01:09:38,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:38,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:38,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:38,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:38,706 INFO L87 Difference]: Start difference. First operand 682 states and 1065 transitions. Second operand 4 states. [2019-10-15 01:09:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:38,876 INFO L93 Difference]: Finished difference Result 1326 states and 2092 transitions. [2019-10-15 01:09:38,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:38,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-15 01:09:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:38,881 INFO L225 Difference]: With dead ends: 1326 [2019-10-15 01:09:38,881 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 01:09:38,885 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 01:09:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 01:09:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 01:09:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1060 transitions. [2019-10-15 01:09:38,906 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1060 transitions. Word has length 127 [2019-10-15 01:09:38,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:38,907 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1060 transitions. [2019-10-15 01:09:38,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:38,907 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1060 transitions. [2019-10-15 01:09:38,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 01:09:38,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:38,909 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:39,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:39,117 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:39,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:39,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1252577017, now seen corresponding path program 1 times [2019-10-15 01:09:39,119 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:39,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329104425] [2019-10-15 01:09:39,119 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:39,120 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:39,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:39,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329104425] [2019-10-15 01:09:39,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592533535] [2019-10-15 01:09:39,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:40,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:40,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:40,148 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:40,351 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:40,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:40,352 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941621057] [2019-10-15 01:09:40,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:40,353 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:40,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:40,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:40,353 INFO L87 Difference]: Start difference. First operand 682 states and 1060 transitions. Second operand 4 states. [2019-10-15 01:09:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:40,564 INFO L93 Difference]: Finished difference Result 1362 states and 2141 transitions. [2019-10-15 01:09:40,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:40,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-15 01:09:40,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:40,573 INFO L225 Difference]: With dead ends: 1362 [2019-10-15 01:09:40,573 INFO L226 Difference]: Without dead ends: 721 [2019-10-15 01:09:40,578 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-15 01:09:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2019-10-15 01:09:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-15 01:09:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1124 transitions. [2019-10-15 01:09:40,603 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1124 transitions. Word has length 129 [2019-10-15 01:09:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:40,604 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1124 transitions. [2019-10-15 01:09:40,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1124 transitions. [2019-10-15 01:09:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:40,606 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:40,607 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:40,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:40,821 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:40,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:40,821 INFO L82 PathProgramCache]: Analyzing trace with hash -402045729, now seen corresponding path program 1 times [2019-10-15 01:09:40,822 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:40,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417757930] [2019-10-15 01:09:40,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:40,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:40,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:41,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417757930] [2019-10-15 01:09:41,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345754274] [2019-10-15 01:09:41,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:41,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:41,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:41,824 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:42,030 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:42,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:42,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946577377] [2019-10-15 01:09:42,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:42,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:42,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:42,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:42,032 INFO L87 Difference]: Start difference. First operand 721 states and 1124 transitions. Second operand 4 states. [2019-10-15 01:09:42,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:42,231 INFO L93 Difference]: Finished difference Result 1365 states and 2144 transitions. [2019-10-15 01:09:42,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:42,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-15 01:09:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:42,237 INFO L225 Difference]: With dead ends: 1365 [2019-10-15 01:09:42,237 INFO L226 Difference]: Without dead ends: 721 [2019-10-15 01:09:42,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-15 01:09:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2019-10-15 01:09:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-15 01:09:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1119 transitions. [2019-10-15 01:09:42,263 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1119 transitions. Word has length 130 [2019-10-15 01:09:42,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:42,264 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 1119 transitions. [2019-10-15 01:09:42,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1119 transitions. [2019-10-15 01:09:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:42,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:42,267 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:42,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:42,484 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:42,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1281147742, now seen corresponding path program 1 times [2019-10-15 01:09:42,485 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:42,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728773345] [2019-10-15 01:09:42,485 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:42,485 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:42,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:42,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728773345] [2019-10-15 01:09:42,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998187460] [2019-10-15 01:09:42,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:43,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:43,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:43,375 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:43,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:43,957 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:43,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:43,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440317417] [2019-10-15 01:09:43,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:43,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:43,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:43,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:43,959 INFO L87 Difference]: Start difference. First operand 721 states and 1119 transitions. Second operand 9 states. [2019-10-15 01:09:44,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:44,209 INFO L93 Difference]: Finished difference Result 1378 states and 2158 transitions. [2019-10-15 01:09:44,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:44,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-10-15 01:09:44,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:44,216 INFO L225 Difference]: With dead ends: 1378 [2019-10-15 01:09:44,216 INFO L226 Difference]: Without dead ends: 737 [2019-10-15 01:09:44,219 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:44,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2019-10-15 01:09:44,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 730. [2019-10-15 01:09:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2019-10-15 01:09:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1132 transitions. [2019-10-15 01:09:44,248 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1132 transitions. Word has length 130 [2019-10-15 01:09:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:44,248 INFO L462 AbstractCegarLoop]: Abstraction has 730 states and 1132 transitions. [2019-10-15 01:09:44,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1132 transitions. [2019-10-15 01:09:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:09:44,251 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:44,252 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:44,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:44,459 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:44,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2030394411, now seen corresponding path program 1 times [2019-10-15 01:09:44,460 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:44,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909645781] [2019-10-15 01:09:44,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:44,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:44,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:44,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909645781] [2019-10-15 01:09:44,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739771030] [2019-10-15 01:09:44,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:45,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:45,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:45,396 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:45,590 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:45,591 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:45,591 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974422400] [2019-10-15 01:09:45,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:45,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:45,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:45,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:45,592 INFO L87 Difference]: Start difference. First operand 730 states and 1132 transitions. Second operand 4 states. [2019-10-15 01:09:45,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:45,808 INFO L93 Difference]: Finished difference Result 1379 states and 2161 transitions. [2019-10-15 01:09:45,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:45,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-15 01:09:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:45,814 INFO L225 Difference]: With dead ends: 1379 [2019-10-15 01:09:45,815 INFO L226 Difference]: Without dead ends: 730 [2019-10-15 01:09:45,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:45,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2019-10-15 01:09:45,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 730. [2019-10-15 01:09:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2019-10-15 01:09:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1127 transitions. [2019-10-15 01:09:45,868 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1127 transitions. Word has length 131 [2019-10-15 01:09:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:45,870 INFO L462 AbstractCegarLoop]: Abstraction has 730 states and 1127 transitions. [2019-10-15 01:09:45,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1127 transitions. [2019-10-15 01:09:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 01:09:45,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:45,874 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:46,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:46,085 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:46,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:46,086 INFO L82 PathProgramCache]: Analyzing trace with hash 471660285, now seen corresponding path program 1 times [2019-10-15 01:09:46,086 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:46,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742466462] [2019-10-15 01:09:46,086 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:46,086 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:46,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:46,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742466462] [2019-10-15 01:09:46,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146006685] [2019-10-15 01:09:46,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:47,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:47,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:47,061 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:47,378 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:47,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:47,378 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010880916] [2019-10-15 01:09:47,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:47,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:47,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:47,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:47,381 INFO L87 Difference]: Start difference. First operand 730 states and 1127 transitions. Second operand 11 states. [2019-10-15 01:09:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:47,531 INFO L93 Difference]: Finished difference Result 1316 states and 2055 transitions. [2019-10-15 01:09:47,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:47,532 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-15 01:09:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:47,538 INFO L225 Difference]: With dead ends: 1316 [2019-10-15 01:09:47,538 INFO L226 Difference]: Without dead ends: 747 [2019-10-15 01:09:47,542 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2019-10-15 01:09:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 737. [2019-10-15 01:09:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2019-10-15 01:09:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1137 transitions. [2019-10-15 01:09:47,575 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1137 transitions. Word has length 130 [2019-10-15 01:09:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:47,575 INFO L462 AbstractCegarLoop]: Abstraction has 737 states and 1137 transitions. [2019-10-15 01:09:47,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1137 transitions. [2019-10-15 01:09:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:47,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:47,578 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:47,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:47,786 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:47,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:47,787 INFO L82 PathProgramCache]: Analyzing trace with hash -542214372, now seen corresponding path program 1 times [2019-10-15 01:09:47,787 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:47,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842946029] [2019-10-15 01:09:47,788 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:47,788 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:47,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:47,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842946029] [2019-10-15 01:09:47,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111306514] [2019-10-15 01:09:47,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:48,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:48,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:48,670 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:49,062 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-10-15 01:09:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:49,092 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:49,092 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:49,093 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034185381] [2019-10-15 01:09:49,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:49,095 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:49,096 INFO L87 Difference]: Start difference. First operand 737 states and 1137 transitions. Second operand 8 states. [2019-10-15 01:09:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:49,221 INFO L93 Difference]: Finished difference Result 1320 states and 2064 transitions. [2019-10-15 01:09:49,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:49,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2019-10-15 01:09:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:49,226 INFO L225 Difference]: With dead ends: 1320 [2019-10-15 01:09:49,226 INFO L226 Difference]: Without dead ends: 751 [2019-10-15 01:09:49,230 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 257 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:49,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2019-10-15 01:09:49,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 744. [2019-10-15 01:09:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-10-15 01:09:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1148 transitions. [2019-10-15 01:09:49,263 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1148 transitions. Word has length 133 [2019-10-15 01:09:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:49,263 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 1148 transitions. [2019-10-15 01:09:49,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1148 transitions. [2019-10-15 01:09:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:49,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:49,266 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:49,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:49,474 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:49,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:49,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1768114844, now seen corresponding path program 1 times [2019-10-15 01:09:49,475 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:49,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568729102] [2019-10-15 01:09:49,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:49,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:49,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:49,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568729102] [2019-10-15 01:09:49,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450543694] [2019-10-15 01:09:49,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:50,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:50,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:50,342 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:50,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:50,786 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:50,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:50,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087173991] [2019-10-15 01:09:50,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:50,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:50,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:50,787 INFO L87 Difference]: Start difference. First operand 744 states and 1148 transitions. Second operand 14 states. [2019-10-15 01:09:51,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:51,085 INFO L93 Difference]: Finished difference Result 1321 states and 2064 transitions. [2019-10-15 01:09:51,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:09:51,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2019-10-15 01:09:51,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:51,091 INFO L225 Difference]: With dead ends: 1321 [2019-10-15 01:09:51,091 INFO L226 Difference]: Without dead ends: 752 [2019-10-15 01:09:51,094 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 252 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2019-10-15 01:09:51,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 744. [2019-10-15 01:09:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-10-15 01:09:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1148 transitions. [2019-10-15 01:09:51,121 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1148 transitions. Word has length 133 [2019-10-15 01:09:51,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:51,121 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 1148 transitions. [2019-10-15 01:09:51,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:09:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1148 transitions. [2019-10-15 01:09:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-15 01:09:51,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:51,124 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:51,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:51,332 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:51,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1440813212, now seen corresponding path program 1 times [2019-10-15 01:09:51,333 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:51,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621306908] [2019-10-15 01:09:51,333 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:51,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:51,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:51,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621306908] [2019-10-15 01:09:51,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317081946] [2019-10-15 01:09:51,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:52,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:52,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:52,271 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:52,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:52,728 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:52,728 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-15 01:09:52,728 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024260539] [2019-10-15 01:09:52,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:52,729 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:52,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:52,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:52,730 INFO L87 Difference]: Start difference. First operand 744 states and 1148 transitions. Second operand 11 states. [2019-10-15 01:09:52,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:52,906 INFO L93 Difference]: Finished difference Result 1322 states and 2072 transitions. [2019-10-15 01:09:52,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:52,906 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 134 [2019-10-15 01:09:52,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:52,911 INFO L225 Difference]: With dead ends: 1322 [2019-10-15 01:09:52,911 INFO L226 Difference]: Without dead ends: 753 [2019-10-15 01:09:52,915 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 255 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:52,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2019-10-15 01:09:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 746. [2019-10-15 01:09:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2019-10-15 01:09:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1154 transitions. [2019-10-15 01:09:52,940 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1154 transitions. Word has length 134 [2019-10-15 01:09:52,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:52,940 INFO L462 AbstractCegarLoop]: Abstraction has 746 states and 1154 transitions. [2019-10-15 01:09:52,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1154 transitions. [2019-10-15 01:09:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 01:09:52,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:52,943 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:53,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:53,151 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:53,152 INFO L82 PathProgramCache]: Analyzing trace with hash -830897423, now seen corresponding path program 1 times [2019-10-15 01:09:53,152 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:53,153 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803970710] [2019-10-15 01:09:53,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:53,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:53,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:53,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803970710] [2019-10-15 01:09:53,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057494646] [2019-10-15 01:09:53,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:53,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:53,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:54,015 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:54,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:54,315 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:54,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-15 01:09:54,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137622030] [2019-10-15 01:09:54,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:54,316 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:54,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:54,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:54,317 INFO L87 Difference]: Start difference. First operand 746 states and 1154 transitions. Second operand 9 states. [2019-10-15 01:09:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:54,464 INFO L93 Difference]: Finished difference Result 1418 states and 2237 transitions. [2019-10-15 01:09:54,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:54,465 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-15 01:09:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:54,537 INFO L225 Difference]: With dead ends: 1418 [2019-10-15 01:09:54,537 INFO L226 Difference]: Without dead ends: 755 [2019-10-15 01:09:54,540 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2019-10-15 01:09:54,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 753. [2019-10-15 01:09:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 753 states. [2019-10-15 01:09:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1162 transitions. [2019-10-15 01:09:54,566 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1162 transitions. Word has length 133 [2019-10-15 01:09:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:54,566 INFO L462 AbstractCegarLoop]: Abstraction has 753 states and 1162 transitions. [2019-10-15 01:09:54,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1162 transitions. [2019-10-15 01:09:54,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 01:09:54,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:54,569 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:54,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:54,784 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1683046364, now seen corresponding path program 1 times [2019-10-15 01:09:54,785 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:54,785 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156615874] [2019-10-15 01:09:54,786 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:54,786 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:54,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:54,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156615874] [2019-10-15 01:09:54,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654108616] [2019-10-15 01:09:54,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:55,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:55,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:55,642 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:55,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:55,931 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:55,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-15 01:09:55,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689517572] [2019-10-15 01:09:55,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:55,932 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:55,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:55,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:55,933 INFO L87 Difference]: Start difference. First operand 753 states and 1162 transitions. Second operand 8 states. [2019-10-15 01:09:56,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:56,049 INFO L93 Difference]: Finished difference Result 1432 states and 2248 transitions. [2019-10-15 01:09:56,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:09:56,050 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2019-10-15 01:09:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:56,054 INFO L225 Difference]: With dead ends: 1432 [2019-10-15 01:09:56,054 INFO L226 Difference]: Without dead ends: 762 [2019-10-15 01:09:56,057 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:09:56,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2019-10-15 01:09:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 757. [2019-10-15 01:09:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 757 states. [2019-10-15 01:09:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1168 transitions. [2019-10-15 01:09:56,083 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1168 transitions. Word has length 136 [2019-10-15 01:09:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:56,083 INFO L462 AbstractCegarLoop]: Abstraction has 757 states and 1168 transitions. [2019-10-15 01:09:56,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1168 transitions. [2019-10-15 01:09:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 01:09:56,086 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:56,086 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:56,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:56,294 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:56,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1774892016, now seen corresponding path program 1 times [2019-10-15 01:09:56,294 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:56,295 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782350745] [2019-10-15 01:09:56,295 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:56,295 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:56,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat