/usr/bin/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_product17.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:40:00,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:40:00,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:40:00,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:40:00,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:40:00,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:40:00,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:40:00,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:40:00,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:40:00,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:40:00,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:40:00,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:40:00,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:40:00,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:40:00,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:40:00,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:40:00,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:40:00,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:40:00,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:40:00,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:40:00,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:40:00,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:40:00,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:40:00,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:40:00,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:40:00,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:40:00,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:40:00,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:40:00,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:40:00,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:40:00,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:40:00,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:40:00,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:40:00,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:40:00,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:40:00,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:40:00,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:40:00,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:40:00,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:40:00,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:40:00,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:40:00,765 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 [2019-11-07 00:40:00,778 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:40:00,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:40:00,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:40:00,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:40:00,780 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:40:00,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:40:00,780 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:40:00,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:40:00,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:40:00,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:40:00,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:40:00,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:40:00,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:40:00,782 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:40:00,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:40:00,782 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:40:00,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:40:00,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:40:00,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:40:00,783 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:40:00,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:40:00,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:40:00,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:40:00,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:40:00,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:40:00,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:40:00,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:40:00,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:40:00,785 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 [2019-11-07 00:40:01,055 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:40:01,074 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:40:01,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:40:01,079 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:40:01,080 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:40:01,081 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product17.cil.c [2019-11-07 00:40:01,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a488e5659/c17697233b254a49bf3772152a2376ab/FLAGe641d2686 [2019-11-07 00:40:01,778 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:40:01,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product17.cil.c [2019-11-07 00:40:01,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a488e5659/c17697233b254a49bf3772152a2376ab/FLAGe641d2686 [2019-11-07 00:40:01,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a488e5659/c17697233b254a49bf3772152a2376ab [2019-11-07 00:40:01,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:40:01,992 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:40:01,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:40:01,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:40:01,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:40:01,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:40:01" (1/1) ... [2019-11-07 00:40:02,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510f79ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:01, skipping insertion in model container [2019-11-07 00:40:02,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:40:01" (1/1) ... [2019-11-07 00:40:02,008 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:40:02,078 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:40:02,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:40:02,830 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:40:03,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:40:03,092 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:40:03,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:03 WrapperNode [2019-11-07 00:40:03,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:40:03,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:40:03,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:40:03,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:40:03,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:03" (1/1) ... [2019-11-07 00:40:03,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:03" (1/1) ... [2019-11-07 00:40:03,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:03" (1/1) ... [2019-11-07 00:40:03,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:03" (1/1) ... [2019-11-07 00:40:03,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:03" (1/1) ... [2019-11-07 00:40:03,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:03" (1/1) ... [2019-11-07 00:40:03,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:03" (1/1) ... [2019-11-07 00:40:03,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:40:03,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:40:03,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:40:03,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:40:03,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:03" (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 [2019-11-07 00:40:03,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:40:03,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:40:03,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:40:03,395 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:40:03,395 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:40:03,396 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:40:03,396 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:40:03,396 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:40:03,397 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:40:03,397 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:40:03,398 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:40:03,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:40:03,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:40:03,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:40:03,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:40:03,400 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:40:03,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:40:03,403 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:40:03,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:40:03,404 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:40:03,404 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:40:03,404 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:40:03,405 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:40:03,405 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:40:03,405 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:40:03,406 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:40:03,406 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:40:03,406 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:40:03,406 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:40:03,406 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:40:03,407 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:40:03,407 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:40:03,407 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:40:03,407 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:40:03,407 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:40:03,408 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:40:03,408 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:40:03,408 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:40:03,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:40:03,409 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:40:03,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:40:03,409 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:40:03,409 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:40:03,409 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:40:03,410 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:40:03,410 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:40:03,410 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:40:03,410 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:40:03,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:40:03,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:40:03,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:40:03,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:40:03,411 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:40:03,411 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:40:03,412 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:40:03,412 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:40:03,412 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:40:03,412 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:40:03,412 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:40:03,412 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:40:03,413 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:40:03,413 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:40:03,413 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:40:03,414 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:40:03,414 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:40:03,414 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:40:03,414 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:40:03,415 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:40:03,415 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:40:03,415 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:40:03,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:40:03,415 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:40:03,415 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:40:03,416 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:40:03,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:40:03,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:40:03,417 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:40:03,417 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:40:03,418 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:40:03,418 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:40:03,419 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:40:03,419 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:40:03,419 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:40:03,419 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:40:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:40:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:40:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:40:03,422 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:40:03,422 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:40:03,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:40:03,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:40:03,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:40:03,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:40:03,423 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:40:03,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:40:03,424 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:40:03,424 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:40:03,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:40:03,424 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:40:03,424 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:40:03,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:40:03,425 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:40:03,425 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:40:03,425 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:40:03,425 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:40:03,426 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:40:03,426 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:40:03,426 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:40:03,426 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:40:03,426 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:40:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:40:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:40:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:40:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:40:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:40:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:40:03,428 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:40:03,428 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:40:03,429 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:40:03,429 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:40:03,429 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:40:03,429 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:40:03,430 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:40:03,430 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:40:03,431 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:40:03,431 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:40:03,431 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:40:03,431 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:40:03,432 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:40:03,432 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:40:03,432 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:40:03,433 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:40:03,433 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:40:03,433 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:40:03,433 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:40:03,434 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:40:03,435 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:40:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:40:03,439 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:40:03,439 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:40:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:40:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:40:03,440 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:40:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:40:03,448 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:40:03,448 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:40:03,449 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:40:03,449 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:40:03,449 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:40:03,449 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:40:03,449 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:40:03,449 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:40:03,450 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:40:03,450 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:40:03,450 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:40:03,450 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:40:03,450 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:40:03,450 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:40:03,450 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:40:03,452 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:40:03,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:40:03,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:40:03,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:40:05,997 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:40:05,997 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:40:05,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:05 BoogieIcfgContainer [2019-11-07 00:40:06,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:40:06,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:40:06,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:40:06,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:40:06,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:40:01" (1/3) ... [2019-11-07 00:40:06,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0accfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:06, skipping insertion in model container [2019-11-07 00:40:06,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:03" (2/3) ... [2019-11-07 00:40:06,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0accfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:06, skipping insertion in model container [2019-11-07 00:40:06,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:05" (3/3) ... [2019-11-07 00:40:06,006 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product17.cil.c [2019-11-07 00:40:06,015 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:40:06,022 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:40:06,033 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:40:06,077 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:40:06,077 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:40:06,077 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:40:06,078 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:40:06,078 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:40:06,078 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:40:06,078 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:40:06,078 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:40:06,123 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states. [2019-11-07 00:40:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-07 00:40:06,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:06,159 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:06,162 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:06,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1132113922, now seen corresponding path program 1 times [2019-11-07 00:40:06,176 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:06,176 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680034209] [2019-11-07 00:40:06,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:06,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680034209] [2019-11-07 00:40:06,852 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767608825] [2019-11-07 00:40:06,852 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 [2019-11-07 00:40:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:07,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 3207 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 00:40:07,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:07,636 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:07,881 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:07,882 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-11-07 00:40:07,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134176049] [2019-11-07 00:40:07,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:40:07,896 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:07,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:40:07,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:40:07,914 INFO L87 Difference]: Start difference. First operand 743 states. Second operand 2 states. [2019-11-07 00:40:08,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:08,026 INFO L93 Difference]: Finished difference Result 626 states and 1002 transitions. [2019-11-07 00:40:08,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:40:08,028 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 138 [2019-11-07 00:40:08,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:08,063 INFO L225 Difference]: With dead ends: 626 [2019-11-07 00:40:08,064 INFO L226 Difference]: Without dead ends: 589 [2019-11-07 00:40:08,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:40:08,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-11-07 00:40:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2019-11-07 00:40:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2019-11-07 00:40:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 947 transitions. [2019-11-07 00:40:08,216 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 947 transitions. Word has length 138 [2019-11-07 00:40:08,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:08,220 INFO L462 AbstractCegarLoop]: Abstraction has 589 states and 947 transitions. [2019-11-07 00:40:08,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:40:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 947 transitions. [2019-11-07 00:40:08,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:40:08,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:08,232 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:08,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:08,440 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:08,441 INFO L82 PathProgramCache]: Analyzing trace with hash 296066837, now seen corresponding path program 1 times [2019-11-07 00:40:08,441 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:08,441 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487338895] [2019-11-07 00:40:08,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:08,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487338895] [2019-11-07 00:40:08,735 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481133015] [2019-11-07 00:40:08,735 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 [2019-11-07 00:40:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:09,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 3210 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:09,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:09,404 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:09,691 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:09,691 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:09,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893558495] [2019-11-07 00:40:09,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:09,693 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:09,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:09,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:09,694 INFO L87 Difference]: Start difference. First operand 589 states and 947 transitions. Second operand 4 states. [2019-11-07 00:40:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:09,805 INFO L93 Difference]: Finished difference Result 1150 states and 1867 transitions. [2019-11-07 00:40:09,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:09,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-11-07 00:40:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:09,811 INFO L225 Difference]: With dead ends: 1150 [2019-11-07 00:40:09,811 INFO L226 Difference]: Without dead ends: 589 [2019-11-07 00:40:09,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:09,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-11-07 00:40:09,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2019-11-07 00:40:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2019-11-07 00:40:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 946 transitions. [2019-11-07 00:40:09,856 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 946 transitions. Word has length 140 [2019-11-07 00:40:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:09,857 INFO L462 AbstractCegarLoop]: Abstraction has 589 states and 946 transitions. [2019-11-07 00:40:09,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 946 transitions. [2019-11-07 00:40:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:40:09,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:09,863 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:10,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:10,071 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1619685945, now seen corresponding path program 1 times [2019-11-07 00:40:10,072 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:10,072 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505253895] [2019-11-07 00:40:10,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:10,256 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505253895] [2019-11-07 00:40:10,256 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573380730] [2019-11-07 00:40:10,256 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 [2019-11-07 00:40:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:10,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 3212 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:10,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:10,902 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:11,095 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:11,095 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:11,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032140846] [2019-11-07 00:40:11,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:11,097 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:11,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:11,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:11,097 INFO L87 Difference]: Start difference. First operand 589 states and 946 transitions. Second operand 4 states. [2019-11-07 00:40:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:11,184 INFO L93 Difference]: Finished difference Result 1150 states and 1865 transitions. [2019-11-07 00:40:11,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:11,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-11-07 00:40:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:11,189 INFO L225 Difference]: With dead ends: 1150 [2019-11-07 00:40:11,189 INFO L226 Difference]: Without dead ends: 589 [2019-11-07 00:40:11,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-11-07 00:40:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2019-11-07 00:40:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2019-11-07 00:40:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 945 transitions. [2019-11-07 00:40:11,224 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 945 transitions. Word has length 142 [2019-11-07 00:40:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:11,224 INFO L462 AbstractCegarLoop]: Abstraction has 589 states and 945 transitions. [2019-11-07 00:40:11,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 945 transitions. [2019-11-07 00:40:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:40:11,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:11,230 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:11,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:11,439 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1401716195, now seen corresponding path program 1 times [2019-11-07 00:40:11,440 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:11,441 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350795781] [2019-11-07 00:40:11,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:11,636 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350795781] [2019-11-07 00:40:11,636 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58419175] [2019-11-07 00:40:11,636 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 [2019-11-07 00:40:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:12,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:12,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:12,280 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:12,524 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:12,524 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:12,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833171110] [2019-11-07 00:40:12,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:12,525 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:12,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:12,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:12,527 INFO L87 Difference]: Start difference. First operand 589 states and 945 transitions. Second operand 4 states. [2019-11-07 00:40:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:12,661 INFO L93 Difference]: Finished difference Result 1157 states and 1872 transitions. [2019-11-07 00:40:12,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:12,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-11-07 00:40:12,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:12,672 INFO L225 Difference]: With dead ends: 1157 [2019-11-07 00:40:12,673 INFO L226 Difference]: Without dead ends: 598 [2019-11-07 00:40:12,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-11-07 00:40:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-11-07 00:40:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-11-07 00:40:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 957 transitions. [2019-11-07 00:40:12,712 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 957 transitions. Word has length 144 [2019-11-07 00:40:12,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:12,713 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 957 transitions. [2019-11-07 00:40:12,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 957 transitions. [2019-11-07 00:40:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 00:40:12,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:12,720 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:12,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:12,928 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:12,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1990322423, now seen corresponding path program 1 times [2019-11-07 00:40:12,929 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:12,929 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240354902] [2019-11-07 00:40:12,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:13,072 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240354902] [2019-11-07 00:40:13,072 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085736365] [2019-11-07 00:40:13,072 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 [2019-11-07 00:40:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:13,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 3215 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:13,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:13,666 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:13,993 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:13,993 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:13,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004156366] [2019-11-07 00:40:13,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:13,994 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:13,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:13,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:13,995 INFO L87 Difference]: Start difference. First operand 598 states and 957 transitions. Second operand 4 states. [2019-11-07 00:40:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:14,103 INFO L93 Difference]: Finished difference Result 1159 states and 1873 transitions. [2019-11-07 00:40:14,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:14,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-11-07 00:40:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:14,117 INFO L225 Difference]: With dead ends: 1159 [2019-11-07 00:40:14,118 INFO L226 Difference]: Without dead ends: 598 [2019-11-07 00:40:14,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-11-07 00:40:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-11-07 00:40:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-11-07 00:40:14,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 956 transitions. [2019-11-07 00:40:14,163 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 956 transitions. Word has length 145 [2019-11-07 00:40:14,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:14,164 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 956 transitions. [2019-11-07 00:40:14,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 956 transitions. [2019-11-07 00:40:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 00:40:14,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:14,173 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:14,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:14,392 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:14,392 INFO L82 PathProgramCache]: Analyzing trace with hash 769578593, now seen corresponding path program 1 times [2019-11-07 00:40:14,392 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:14,393 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847286681] [2019-11-07 00:40:14,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:14,526 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847286681] [2019-11-07 00:40:14,526 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465685859] [2019-11-07 00:40:14,526 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 [2019-11-07 00:40:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:15,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 3216 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:15,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:15,167 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:15,398 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:15,398 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:40:15,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972427726] [2019-11-07 00:40:15,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:15,400 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:15,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:15,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:40:15,400 INFO L87 Difference]: Start difference. First operand 598 states and 956 transitions. Second operand 4 states. [2019-11-07 00:40:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:15,482 INFO L93 Difference]: Finished difference Result 1159 states and 1872 transitions. [2019-11-07 00:40:15,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:15,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-11-07 00:40:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:15,488 INFO L225 Difference]: With dead ends: 1159 [2019-11-07 00:40:15,488 INFO L226 Difference]: Without dead ends: 598 [2019-11-07 00:40:15,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:15,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-11-07 00:40:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-11-07 00:40:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-11-07 00:40:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 955 transitions. [2019-11-07 00:40:15,551 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 955 transitions. Word has length 146 [2019-11-07 00:40:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:15,551 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 955 transitions. [2019-11-07 00:40:15,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:15,551 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 955 transitions. [2019-11-07 00:40:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:40:15,555 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:15,555 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:15,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:15,769 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1713500357, now seen corresponding path program 1 times [2019-11-07 00:40:15,770 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:15,770 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263753695] [2019-11-07 00:40:15,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:15,938 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263753695] [2019-11-07 00:40:15,938 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295371529] [2019-11-07 00:40:15,938 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 [2019-11-07 00:40:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:16,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:16,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:16,679 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:17,061 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:17,062 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-11-07 00:40:17,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137758154] [2019-11-07 00:40:17,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:40:17,063 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:17,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:40:17,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:17,064 INFO L87 Difference]: Start difference. First operand 598 states and 955 transitions. Second operand 7 states. [2019-11-07 00:40:17,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:17,251 INFO L93 Difference]: Finished difference Result 1166 states and 1881 transitions. [2019-11-07 00:40:17,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:17,252 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2019-11-07 00:40:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:17,261 INFO L225 Difference]: With dead ends: 1166 [2019-11-07 00:40:17,261 INFO L226 Difference]: Without dead ends: 609 [2019-11-07 00:40:17,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 286 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:40:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-11-07 00:40:17,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 605. [2019-11-07 00:40:17,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-11-07 00:40:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 965 transitions. [2019-11-07 00:40:17,354 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 965 transitions. Word has length 147 [2019-11-07 00:40:17,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:17,355 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 965 transitions. [2019-11-07 00:40:17,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:40:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 965 transitions. [2019-11-07 00:40:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:40:17,362 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:17,362 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:17,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:17,574 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:17,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1757785468, now seen corresponding path program 1 times [2019-11-07 00:40:17,575 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:17,575 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044391747] [2019-11-07 00:40:17,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:17,746 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044391747] [2019-11-07 00:40:17,754 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47369327] [2019-11-07 00:40:17,754 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 [2019-11-07 00:40:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:18,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 3216 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:18,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:18,471 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:18,705 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:18,705 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:40:18,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737712384] [2019-11-07 00:40:18,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:18,706 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:18,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:18,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:40:18,707 INFO L87 Difference]: Start difference. First operand 605 states and 965 transitions. Second operand 4 states. [2019-11-07 00:40:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:18,865 INFO L93 Difference]: Finished difference Result 1171 states and 1892 transitions. [2019-11-07 00:40:18,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:18,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-11-07 00:40:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:18,870 INFO L225 Difference]: With dead ends: 1171 [2019-11-07 00:40:18,870 INFO L226 Difference]: Without dead ends: 605 [2019-11-07 00:40:18,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:40:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-11-07 00:40:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-11-07 00:40:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-11-07 00:40:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 960 transitions. [2019-11-07 00:40:18,897 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 960 transitions. Word has length 147 [2019-11-07 00:40:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:18,897 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 960 transitions. [2019-11-07 00:40:18,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 960 transitions. [2019-11-07 00:40:18,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:40:18,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:18,901 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:19,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:19,117 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:19,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:19,118 INFO L82 PathProgramCache]: Analyzing trace with hash 157892612, now seen corresponding path program 1 times [2019-11-07 00:40:19,118 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:19,118 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806362915] [2019-11-07 00:40:19,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:40:19,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806362915] [2019-11-07 00:40:19,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462294255] [2019-11-07 00:40:19,253 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 [2019-11-07 00:40:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:20,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 3220 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:20,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:20,183 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:20,385 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:20,385 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-11-07 00:40:20,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799254119] [2019-11-07 00:40:20,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:20,386 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:20,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:20,387 INFO L87 Difference]: Start difference. First operand 605 states and 960 transitions. Second operand 4 states. [2019-11-07 00:40:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:20,551 INFO L93 Difference]: Finished difference Result 1171 states and 1882 transitions. [2019-11-07 00:40:20,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:40:20,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2019-11-07 00:40:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:20,558 INFO L225 Difference]: With dead ends: 1171 [2019-11-07 00:40:20,558 INFO L226 Difference]: Without dead ends: 605 [2019-11-07 00:40:20,561 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:20,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-11-07 00:40:20,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-11-07 00:40:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-11-07 00:40:20,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 955 transitions. [2019-11-07 00:40:20,584 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 955 transitions. Word has length 150 [2019-11-07 00:40:20,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:20,585 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 955 transitions. [2019-11-07 00:40:20,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:20,585 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 955 transitions. [2019-11-07 00:40:20,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-07 00:40:20,589 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:20,589 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:20,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:20,797 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:20,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:20,798 INFO L82 PathProgramCache]: Analyzing trace with hash 500102925, now seen corresponding path program 1 times [2019-11-07 00:40:20,798 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:20,799 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439188518] [2019-11-07 00:40:20,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:20,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439188518] [2019-11-07 00:40:20,957 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429526430] [2019-11-07 00:40:20,957 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 [2019-11-07 00:40:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:21,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 3221 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:21,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:21,774 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:22,179 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:22,179 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 10 [2019-11-07 00:40:22,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516162362] [2019-11-07 00:40:22,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:40:22,180 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:22,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:40:22,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:22,181 INFO L87 Difference]: Start difference. First operand 605 states and 955 transitions. Second operand 7 states. [2019-11-07 00:40:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:22,361 INFO L93 Difference]: Finished difference Result 1172 states and 1870 transitions. [2019-11-07 00:40:22,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:22,362 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 152 [2019-11-07 00:40:22,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:22,369 INFO L225 Difference]: With dead ends: 1172 [2019-11-07 00:40:22,370 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:40:22,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 294 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:40:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 608. [2019-11-07 00:40:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2019-11-07 00:40:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 960 transitions. [2019-11-07 00:40:22,406 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 960 transitions. Word has length 152 [2019-11-07 00:40:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:22,406 INFO L462 AbstractCegarLoop]: Abstraction has 608 states and 960 transitions. [2019-11-07 00:40:22,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:40:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 960 transitions. [2019-11-07 00:40:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-07 00:40:22,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:22,411 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:22,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:22,621 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:22,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1481059154, now seen corresponding path program 1 times [2019-11-07 00:40:22,623 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:22,623 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697407221] [2019-11-07 00:40:22,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 00:40:22,819 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697407221] [2019-11-07 00:40:22,819 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336703035] [2019-11-07 00:40:22,819 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 [2019-11-07 00:40:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:23,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 3222 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:40:23,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:23,906 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:24,228 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:24,228 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-11-07 00:40:24,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545527161] [2019-11-07 00:40:24,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:40:24,230 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:40:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:24,231 INFO L87 Difference]: Start difference. First operand 608 states and 960 transitions. Second operand 4 states. [2019-11-07 00:40:24,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:24,521 INFO L93 Difference]: Finished difference Result 1216 states and 1941 transitions. [2019-11-07 00:40:24,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:40:24,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-11-07 00:40:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:24,530 INFO L225 Difference]: With dead ends: 1216 [2019-11-07 00:40:24,530 INFO L226 Difference]: Without dead ends: 653 [2019-11-07 00:40:24,535 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-11-07 00:40:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 647. [2019-11-07 00:40:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-11-07 00:40:24,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1022 transitions. [2019-11-07 00:40:24,572 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1022 transitions. Word has length 152 [2019-11-07 00:40:24,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:24,572 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1022 transitions. [2019-11-07 00:40:24,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:40:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1022 transitions. [2019-11-07 00:40:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-07 00:40:24,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:24,580 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:24,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:24,791 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:24,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2098391086, now seen corresponding path program 1 times [2019-11-07 00:40:24,792 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:24,801 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4483195] [2019-11-07 00:40:24,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:24,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4483195] [2019-11-07 00:40:24,961 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539501073] [2019-11-07 00:40:24,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-07 00:40:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:25,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 3218 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:25,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:40:25,892 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:26,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:26,386 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:40:26,386 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-11-07 00:40:26,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213679662] [2019-11-07 00:40:26,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:40:26,388 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:26,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:40:26,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:26,389 INFO L87 Difference]: Start difference. First operand 647 states and 1022 transitions. Second operand 9 states. [2019-11-07 00:40:26,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:26,603 INFO L93 Difference]: Finished difference Result 1217 states and 1942 transitions. [2019-11-07 00:40:26,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:40:26,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-11-07 00:40:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:26,609 INFO L225 Difference]: With dead ends: 1217 [2019-11-07 00:40:26,609 INFO L226 Difference]: Without dead ends: 658 [2019-11-07 00:40:26,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:40:26,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2019-11-07 00:40:26,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 649. [2019-11-07 00:40:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2019-11-07 00:40:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1026 transitions. [2019-11-07 00:40:26,640 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1026 transitions. Word has length 152 [2019-11-07 00:40:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:26,640 INFO L462 AbstractCegarLoop]: Abstraction has 649 states and 1026 transitions. [2019-11-07 00:40:26,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:40:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1026 transitions. [2019-11-07 00:40:26,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-07 00:40:26,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:26,645 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:26,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:26,853 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash -215414131, now seen corresponding path program 1 times [2019-11-07 00:40:26,853 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:26,853 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113989272] [2019-11-07 00:40:26,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 00:40:26,978 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113989272] [2019-11-07 00:40:26,978 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996219603] [2019-11-07 00:40:26,979 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 [2019-11-07 00:40:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:27,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:27,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:27,823 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:28,178 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:28,179 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:40:28,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525150653] [2019-11-07 00:40:28,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:40:28,180 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:28,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:40:28,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:40:28,180 INFO L87 Difference]: Start difference. First operand 649 states and 1026 transitions. Second operand 11 states. [2019-11-07 00:40:28,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:28,362 INFO L93 Difference]: Finished difference Result 1151 states and 1839 transitions. [2019-11-07 00:40:28,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:40:28,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 152 [2019-11-07 00:40:28,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:28,369 INFO L225 Difference]: With dead ends: 1151 [2019-11-07 00:40:28,369 INFO L226 Difference]: Without dead ends: 666 [2019-11-07 00:40:28,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:40:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-11-07 00:40:28,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 656. [2019-11-07 00:40:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2019-11-07 00:40:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1036 transitions. [2019-11-07 00:40:28,408 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1036 transitions. Word has length 152 [2019-11-07 00:40:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:28,408 INFO L462 AbstractCegarLoop]: Abstraction has 656 states and 1036 transitions. [2019-11-07 00:40:28,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:40:28,409 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1036 transitions. [2019-11-07 00:40:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:40:28,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:28,415 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:28,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:28,626 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:28,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:28,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1619123996, now seen corresponding path program 1 times [2019-11-07 00:40:28,626 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:28,627 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698722865] [2019-11-07 00:40:28,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:40:28,737 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698722865] [2019-11-07 00:40:28,737 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17803668] [2019-11-07 00:40:28,737 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 [2019-11-07 00:40:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:29,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 3218 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:40:29,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:29,469 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 00:40:29,788 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:29,788 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-11-07 00:40:29,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609380003] [2019-11-07 00:40:29,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:40:29,789 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:29,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:40:29,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:40:29,789 INFO L87 Difference]: Start difference. First operand 656 states and 1036 transitions. Second operand 8 states. [2019-11-07 00:40:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:29,909 INFO L93 Difference]: Finished difference Result 1155 states and 1846 transitions. [2019-11-07 00:40:29,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:40:29,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 153 [2019-11-07 00:40:29,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:29,915 INFO L225 Difference]: With dead ends: 1155 [2019-11-07 00:40:29,915 INFO L226 Difference]: Without dead ends: 670 [2019-11-07 00:40:29,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 297 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:40:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2019-11-07 00:40:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 663. [2019-11-07 00:40:29,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2019-11-07 00:40:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1047 transitions. [2019-11-07 00:40:29,961 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1047 transitions. Word has length 153 [2019-11-07 00:40:29,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:29,961 INFO L462 AbstractCegarLoop]: Abstraction has 663 states and 1047 transitions. [2019-11-07 00:40:29,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:40:29,961 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1047 transitions. [2019-11-07 00:40:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:40:29,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:29,966 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:30,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:30,174 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:30,175 INFO L82 PathProgramCache]: Analyzing trace with hash 609178724, now seen corresponding path program 1 times [2019-11-07 00:40:30,175 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:30,175 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153268737] [2019-11-07 00:40:30,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:30,268 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153268737] [2019-11-07 00:40:30,268 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985571917] [2019-11-07 00:40:30,268 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 [2019-11-07 00:40:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:31,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:31,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:31,127 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:31,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:31,604 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:31,604 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-11-07 00:40:31,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363620856] [2019-11-07 00:40:31,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 00:40:31,605 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:31,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 00:40:31,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:40:31,605 INFO L87 Difference]: Start difference. First operand 663 states and 1047 transitions. Second operand 14 states. [2019-11-07 00:40:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:40:31,867 INFO L93 Difference]: Finished difference Result 1156 states and 1848 transitions. [2019-11-07 00:40:31,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 00:40:31,867 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2019-11-07 00:40:31,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:40:31,872 INFO L225 Difference]: With dead ends: 1156 [2019-11-07 00:40:31,872 INFO L226 Difference]: Without dead ends: 671 [2019-11-07 00:40:31,877 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 292 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:40:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2019-11-07 00:40:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 663. [2019-11-07 00:40:31,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2019-11-07 00:40:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1047 transitions. [2019-11-07 00:40:31,903 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1047 transitions. Word has length 153 [2019-11-07 00:40:31,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:40:31,903 INFO L462 AbstractCegarLoop]: Abstraction has 663 states and 1047 transitions. [2019-11-07 00:40:31,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-07 00:40:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1047 transitions. [2019-11-07 00:40:31,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-07 00:40:31,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:40:31,909 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:40:32,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:40:32,120 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:40:32,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:40:32,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1274916198, now seen corresponding path program 1 times [2019-11-07 00:40:32,121 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:40:32,121 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982366037] [2019-11-07 00:40:32,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:40:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:40:32,222 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982366037] [2019-11-07 00:40:32,222 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473911942] [2019-11-07 00:40:32,223 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 [2019-11-07 00:40:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:40:32,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 3215 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:40:32,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:40:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:33,012 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:40:33,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:40:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 00:40:33,551 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:40:33,551 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-11-07 00:40:33,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855050413] [2019-11-07 00:40:33,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:40:33,552 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:40:33,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:40:33,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:40:33,553 INFO L87 Difference]: Start difference. First operand 663 states and 1047 transitions. Second operand 11 states.