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_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:10:17,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:10:17,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:10:17,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:10:17,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:10:17,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:10:17,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:10:17,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:10:17,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:10:17,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:10:17,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:10:17,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:10:17,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:10:17,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:10:17,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:10:17,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:10:17,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:10:17,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:10:17,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:10:17,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:10:17,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:10:17,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:10:17,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:10:17,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:10:17,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:10:17,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:10:17,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:10:17,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:10:17,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:10:17,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:10:17,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:10:17,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:10:17,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:10:17,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:10:17,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:10:17,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:10:17,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:10:17,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:10:17,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:10:17,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:10:17,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:10:17,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:10:17,087 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:10:17,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:10:17,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:10:17,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:10:17,089 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:10:17,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:10:17,089 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:10:17,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:10:17,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:10:17,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:10:17,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:10:17,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:10:17,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:10:17,090 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:10:17,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:10:17,091 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:10:17,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:10:17,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:10:17,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:10:17,092 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:10:17,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:10:17,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:10:17,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:10:17,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:10:17,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:10:17,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:10:17,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:10:17,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:10:17,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:10:17,385 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:10:17,410 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:10:17,414 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:10:17,417 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:10:17,418 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:10:17,418 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product31.cil.c [2019-10-13 21:10:17,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94ce04c31/84500c19dc74494caae5cadeb615076e/FLAG7c808cac1 [2019-10-13 21:10:18,144 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:10:18,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product31.cil.c [2019-10-13 21:10:18,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94ce04c31/84500c19dc74494caae5cadeb615076e/FLAG7c808cac1 [2019-10-13 21:10:18,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94ce04c31/84500c19dc74494caae5cadeb615076e [2019-10-13 21:10:18,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:10:18,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:10:18,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:18,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:10:18,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:10:18,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:18" (1/1) ... [2019-10-13 21:10:18,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a78272c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:18, skipping insertion in model container [2019-10-13 21:10:18,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:18" (1/1) ... [2019-10-13 21:10:18,368 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:10:18,469 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:10:19,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:19,220 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:10:19,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:19,434 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:10:19,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:19 WrapperNode [2019-10-13 21:10:19,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:19,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:10:19,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:10:19,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:10:19,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:19" (1/1) ... [2019-10-13 21:10:19,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:19" (1/1) ... [2019-10-13 21:10:19,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:19" (1/1) ... [2019-10-13 21:10:19,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:19" (1/1) ... [2019-10-13 21:10:19,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:19" (1/1) ... [2019-10-13 21:10:19,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:19" (1/1) ... [2019-10-13 21:10:19,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:19" (1/1) ... [2019-10-13 21:10:19,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:10:19,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:10:19,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:10:19,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:10:19,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:10:19,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:10:19,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:10:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:19,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:19,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:10:19,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:10:19,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:10:19,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:10:19,741 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:10:19,741 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:10:19,741 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:10:19,742 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:10:19,742 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:10:19,742 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:10:19,744 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:10:19,745 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:10:19,745 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:10:19,745 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:10:19,745 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:10:19,746 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:10:19,746 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:10:19,746 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:10:19,746 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:10:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:10:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:10:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:10:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:10:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:10:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:10:19,748 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:10:19,748 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:10:19,748 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:10:19,748 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:19,749 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:10:19,749 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:10:19,749 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:10:19,749 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:10:19,750 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:10:19,750 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:10:19,750 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:10:19,750 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:10:19,750 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:10:19,751 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:10:19,751 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:10:19,751 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:10:19,751 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:10:19,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:10:19,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:10:19,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:10:19,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:10:19,752 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:10:19,752 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:10:19,753 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:10:19,753 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:10:19,753 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:10:19,753 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:10:19,753 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:10:19,753 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:10:19,754 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:10:19,754 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:10:19,754 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:10:19,755 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:10:19,755 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:10:19,755 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:10:19,755 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:10:19,755 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:10:19,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:10:19,756 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:10:19,756 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:10:19,756 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:10:19,756 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:10:19,757 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:10:19,757 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:10:19,758 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:10:19,758 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:10:19,758 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:10:19,758 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:10:19,759 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:10:19,759 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:10:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:10:19,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:10:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:10:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:10:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:10:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:10:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:10:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:10:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:10:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:10:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:19,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:10:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:10:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:10:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:10:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:10:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:10:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:10:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:10:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:10:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:10:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:10:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:10:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:10:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:10:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:10:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:10:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:10:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:10:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:10:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:10:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:10:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:10:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:10:19,768 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:10:19,768 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:10:19,769 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:10:19,769 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:10:19,769 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:10:19,770 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:10:19,771 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:10:19,771 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:10:19,771 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:10:19,771 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:10:19,771 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:10:19,772 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:10:19,772 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:10:19,772 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:10:19,772 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:10:19,773 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:10:19,773 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:10:19,773 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:10:19,774 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:10:19,777 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:10:19,777 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:19,778 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:10:19,778 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:10:19,778 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:10:19,779 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:10:19,779 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:10:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:10:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:10:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:10:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:10:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:10:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:10:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:10:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:10:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:10:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:10:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:10:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:10:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:10:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:10:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:10:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:10:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:10:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:10:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:10:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:10:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:10:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:10:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:10:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:10:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:10:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:10:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:10:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:10:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:10:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:10:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:10:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:10:19,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:10:22,066 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:10:22,067 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:10:22,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:22 BoogieIcfgContainer [2019-10-13 21:10:22,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:10:22,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:10:22,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:10:22,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:10:22,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:10:18" (1/3) ... [2019-10-13 21:10:22,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229f11a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:22, skipping insertion in model container [2019-10-13 21:10:22,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:19" (2/3) ... [2019-10-13 21:10:22,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229f11a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:22, skipping insertion in model container [2019-10-13 21:10:22,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:22" (3/3) ... [2019-10-13 21:10:22,076 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product31.cil.c [2019-10-13 21:10:22,086 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:10:22,097 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:10:22,109 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:10:22,158 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:10:22,158 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:10:22,159 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:10:22,159 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:10:22,159 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:10:22,159 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:10:22,159 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:10:22,159 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:10:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2019-10-13 21:10:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:10:22,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:22,242 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2019-10-13 21:10:22,244 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:22,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2056996634, now seen corresponding path program 1 times [2019-10-13 21:10:22,261 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:22,261 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413409688] [2019-10-13 21:10:22,262 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:22,262 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:22,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:22,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413409688] [2019-10-13 21:10:22,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597483957] [2019-10-13 21:10:22,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:23,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:10:23,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:10:23,744 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:10:24,023 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:24,023 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:10:24,023 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008997986] [2019-10-13 21:10:24,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:10:24,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:24,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:10:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:24,045 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 2 states. [2019-10-13 21:10:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:24,150 INFO L93 Difference]: Finished difference Result 701 states and 1104 transitions. [2019-10-13 21:10:24,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:10:24,151 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 164 [2019-10-13 21:10:24,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:24,187 INFO L225 Difference]: With dead ends: 701 [2019-10-13 21:10:24,188 INFO L226 Difference]: Without dead ends: 664 [2019-10-13 21:10:24,194 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2019-10-13 21:10:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2019-10-13 21:10:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2019-10-13 21:10:24,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1049 transitions. [2019-10-13 21:10:24,358 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1049 transitions. Word has length 164 [2019-10-13 21:10:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:24,368 INFO L462 AbstractCegarLoop]: Abstraction has 664 states and 1049 transitions. [2019-10-13 21:10:24,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:10:24,369 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1049 transitions. [2019-10-13 21:10:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:10:24,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:24,381 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2019-10-13 21:10:24,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:24,590 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:24,591 INFO L82 PathProgramCache]: Analyzing trace with hash 483003241, now seen corresponding path program 1 times [2019-10-13 21:10:24,592 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:24,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066800206] [2019-10-13 21:10:24,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:24,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066800206] [2019-10-13 21:10:24,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603330790] [2019-10-13 21:10:24,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 3289 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:25,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:10:25,486 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:10:25,760 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:25,760 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-13 21:10:25,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791467080] [2019-10-13 21:10:25,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:10:25,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:25,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:10:25,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:10:25,763 INFO L87 Difference]: Start difference. First operand 664 states and 1049 transitions. Second operand 3 states. [2019-10-13 21:10:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:25,912 INFO L93 Difference]: Finished difference Result 1769 states and 2830 transitions. [2019-10-13 21:10:25,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:10:25,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2019-10-13 21:10:25,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:25,923 INFO L225 Difference]: With dead ends: 1769 [2019-10-13 21:10:25,924 INFO L226 Difference]: Without dead ends: 1214 [2019-10-13 21:10:25,932 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:10:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2019-10-13 21:10:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1192. [2019-10-13 21:10:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-13 21:10:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1903 transitions. [2019-10-13 21:10:26,032 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1903 transitions. Word has length 166 [2019-10-13 21:10:26,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:26,035 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1903 transitions. [2019-10-13 21:10:26,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:10:26,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1903 transitions. [2019-10-13 21:10:26,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:10:26,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:26,046 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2019-10-13 21:10:26,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:26,254 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:26,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:26,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1184603115, now seen corresponding path program 1 times [2019-10-13 21:10:26,255 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:26,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712850033] [2019-10-13 21:10:26,256 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,256 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:26,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:26,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712850033] [2019-10-13 21:10:26,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176404028] [2019-10-13 21:10:26,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:27,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:27,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:27,136 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:27,553 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:27,553 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:27,553 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793310130] [2019-10-13 21:10:27,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:27,554 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:27,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:27,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:27,555 INFO L87 Difference]: Start difference. First operand 1192 states and 1903 transitions. Second operand 4 states. [2019-10-13 21:10:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:27,645 INFO L93 Difference]: Finished difference Result 2356 states and 3779 transitions. [2019-10-13 21:10:27,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:27,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-13 21:10:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:27,655 INFO L225 Difference]: With dead ends: 2356 [2019-10-13 21:10:27,655 INFO L226 Difference]: Without dead ends: 1192 [2019-10-13 21:10:27,661 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2019-10-13 21:10:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1192. [2019-10-13 21:10:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-13 21:10:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1902 transitions. [2019-10-13 21:10:27,714 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1902 transitions. Word has length 166 [2019-10-13 21:10:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:27,715 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1902 transitions. [2019-10-13 21:10:27,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1902 transitions. [2019-10-13 21:10:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 21:10:27,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:27,721 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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] [2019-10-13 21:10:27,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:27,937 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:27,937 INFO L82 PathProgramCache]: Analyzing trace with hash 186796567, now seen corresponding path program 1 times [2019-10-13 21:10:27,938 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:27,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56396933] [2019-10-13 21:10:27,939 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:27,939 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:27,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:28,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56396933] [2019-10-13 21:10:28,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699094942] [2019-10-13 21:10:28,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:28,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:28,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:28,852 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:29,136 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:29,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:29,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441162154] [2019-10-13 21:10:29,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:29,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:29,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:29,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:29,138 INFO L87 Difference]: Start difference. First operand 1192 states and 1902 transitions. Second operand 4 states. [2019-10-13 21:10:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:29,247 INFO L93 Difference]: Finished difference Result 2356 states and 3777 transitions. [2019-10-13 21:10:29,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:29,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-10-13 21:10:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:29,257 INFO L225 Difference]: With dead ends: 2356 [2019-10-13 21:10:29,258 INFO L226 Difference]: Without dead ends: 1192 [2019-10-13 21:10:29,264 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:29,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2019-10-13 21:10:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1192. [2019-10-13 21:10:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-13 21:10:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1901 transitions. [2019-10-13 21:10:29,308 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1901 transitions. Word has length 168 [2019-10-13 21:10:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:29,309 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1901 transitions. [2019-10-13 21:10:29,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1901 transitions. [2019-10-13 21:10:29,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:10:29,314 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:29,315 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 21:10:29,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:29,523 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:29,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1415839309, now seen corresponding path program 1 times [2019-10-13 21:10:29,524 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:29,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290953512] [2019-10-13 21:10:29,524 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:29,524 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:29,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:29,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290953512] [2019-10-13 21:10:29,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405407890] [2019-10-13 21:10:29,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:30,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 3292 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:30,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:30,517 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:30,804 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:30,804 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:30,804 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582694500] [2019-10-13 21:10:30,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:30,805 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:30,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:30,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:30,805 INFO L87 Difference]: Start difference. First operand 1192 states and 1901 transitions. Second operand 4 states. [2019-10-13 21:10:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:30,908 INFO L93 Difference]: Finished difference Result 2363 states and 3784 transitions. [2019-10-13 21:10:30,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:30,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-10-13 21:10:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:30,919 INFO L225 Difference]: With dead ends: 2363 [2019-10-13 21:10:30,920 INFO L226 Difference]: Without dead ends: 1201 [2019-10-13 21:10:30,928 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2019-10-13 21:10:30,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1201. [2019-10-13 21:10:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1201 states. [2019-10-13 21:10:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1913 transitions. [2019-10-13 21:10:30,979 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1913 transitions. Word has length 170 [2019-10-13 21:10:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:30,980 INFO L462 AbstractCegarLoop]: Abstraction has 1201 states and 1913 transitions. [2019-10-13 21:10:30,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1913 transitions. [2019-10-13 21:10:30,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 21:10:30,987 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:30,987 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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, 1, 1] [2019-10-13 21:10:31,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:31,195 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:31,196 INFO L82 PathProgramCache]: Analyzing trace with hash 941734220, now seen corresponding path program 1 times [2019-10-13 21:10:31,196 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:31,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610580229] [2019-10-13 21:10:31,197 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:31,197 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:31,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:31,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610580229] [2019-10-13 21:10:31,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657665979] [2019-10-13 21:10:31,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:32,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 3293 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:32,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:32,558 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:32,999 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:32,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:32,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564682307] [2019-10-13 21:10:33,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:33,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:33,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:33,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:33,004 INFO L87 Difference]: Start difference. First operand 1201 states and 1913 transitions. Second operand 4 states. [2019-10-13 21:10:33,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:33,138 INFO L93 Difference]: Finished difference Result 2365 states and 3785 transitions. [2019-10-13 21:10:33,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:33,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-10-13 21:10:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:33,152 INFO L225 Difference]: With dead ends: 2365 [2019-10-13 21:10:33,152 INFO L226 Difference]: Without dead ends: 1201 [2019-10-13 21:10:33,163 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2019-10-13 21:10:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1201. [2019-10-13 21:10:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1201 states. [2019-10-13 21:10:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1912 transitions. [2019-10-13 21:10:33,234 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1912 transitions. Word has length 171 [2019-10-13 21:10:33,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:33,235 INFO L462 AbstractCegarLoop]: Abstraction has 1201 states and 1912 transitions. [2019-10-13 21:10:33,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1912 transitions. [2019-10-13 21:10:33,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 21:10:33,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:33,245 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2019-10-13 21:10:33,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:33,456 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:33,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:33,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1151365335, now seen corresponding path program 1 times [2019-10-13 21:10:33,458 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:33,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324588445] [2019-10-13 21:10:33,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:33,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:33,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:33,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324588445] [2019-10-13 21:10:33,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329238387] [2019-10-13 21:10:33,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:34,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 3294 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:34,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:34,408 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:34,687 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:34,688 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:34,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190174707] [2019-10-13 21:10:34,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:34,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:34,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:34,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:34,690 INFO L87 Difference]: Start difference. First operand 1201 states and 1912 transitions. Second operand 4 states. [2019-10-13 21:10:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:34,791 INFO L93 Difference]: Finished difference Result 2365 states and 3784 transitions. [2019-10-13 21:10:34,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:34,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-10-13 21:10:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:34,804 INFO L225 Difference]: With dead ends: 2365 [2019-10-13 21:10:34,804 INFO L226 Difference]: Without dead ends: 1201 [2019-10-13 21:10:34,812 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2019-10-13 21:10:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1201. [2019-10-13 21:10:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1201 states. [2019-10-13 21:10:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1911 transitions. [2019-10-13 21:10:34,869 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1911 transitions. Word has length 172 [2019-10-13 21:10:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:34,869 INFO L462 AbstractCegarLoop]: Abstraction has 1201 states and 1911 transitions. [2019-10-13 21:10:34,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:34,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1911 transitions. [2019-10-13 21:10:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 21:10:34,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:34,879 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2019-10-13 21:10:35,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:35,098 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:35,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:35,098 INFO L82 PathProgramCache]: Analyzing trace with hash -800708944, now seen corresponding path program 1 times [2019-10-13 21:10:35,098 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:35,099 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710632968] [2019-10-13 21:10:35,099 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:35,099 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:35,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:35,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710632968] [2019-10-13 21:10:35,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507843905] [2019-10-13 21:10:35,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:36,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 3295 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:36,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:36,353 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:36,913 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:36,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-13 21:10:36,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252886794] [2019-10-13 21:10:36,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:10:36,917 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:36,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:10:36,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:36,918 INFO L87 Difference]: Start difference. First operand 1201 states and 1911 transitions. Second operand 7 states. [2019-10-13 21:10:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:37,071 INFO L93 Difference]: Finished difference Result 2372 states and 3793 transitions. [2019-10-13 21:10:37,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:37,072 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2019-10-13 21:10:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:37,083 INFO L225 Difference]: With dead ends: 2372 [2019-10-13 21:10:37,083 INFO L226 Difference]: Without dead ends: 1212 [2019-10-13 21:10:37,090 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 338 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:10:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2019-10-13 21:10:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1208. [2019-10-13 21:10:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2019-10-13 21:10:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1921 transitions. [2019-10-13 21:10:37,149 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1921 transitions. Word has length 173 [2019-10-13 21:10:37,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:37,150 INFO L462 AbstractCegarLoop]: Abstraction has 1208 states and 1921 transitions. [2019-10-13 21:10:37,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:10:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1921 transitions. [2019-10-13 21:10:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 21:10:37,156 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:37,157 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:37,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:37,365 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:37,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1952487394, now seen corresponding path program 1 times [2019-10-13 21:10:37,365 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:37,365 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911029259] [2019-10-13 21:10:37,365 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:37,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:37,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:10:37,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911029259] [2019-10-13 21:10:37,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891958761] [2019-10-13 21:10:37,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:38,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:38,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:38,284 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:38,550 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:38,550 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:10:38,550 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847310678] [2019-10-13 21:10:38,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:38,551 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:38,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:38,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:38,551 INFO L87 Difference]: Start difference. First operand 1208 states and 1921 transitions. Second operand 4 states. [2019-10-13 21:10:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:38,742 INFO L93 Difference]: Finished difference Result 2377 states and 3804 transitions. [2019-10-13 21:10:38,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:38,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-10-13 21:10:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:38,752 INFO L225 Difference]: With dead ends: 2377 [2019-10-13 21:10:38,753 INFO L226 Difference]: Without dead ends: 1208 [2019-10-13 21:10:38,758 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 345 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:38,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2019-10-13 21:10:38,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1208. [2019-10-13 21:10:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2019-10-13 21:10:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1916 transitions. [2019-10-13 21:10:38,819 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1916 transitions. Word has length 174 [2019-10-13 21:10:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:38,820 INFO L462 AbstractCegarLoop]: Abstraction has 1208 states and 1916 transitions. [2019-10-13 21:10:38,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1916 transitions. [2019-10-13 21:10:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 21:10:38,829 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:38,830 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2019-10-13 21:10:39,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:39,040 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:39,040 INFO L82 PathProgramCache]: Analyzing trace with hash 919914375, now seen corresponding path program 1 times [2019-10-13 21:10:39,040 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:39,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071650980] [2019-10-13 21:10:39,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:39,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:39,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:10:39,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071650980] [2019-10-13 21:10:39,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764845833] [2019-10-13 21:10:39,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:39,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:39,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:39,999 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:40,270 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:40,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:40,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520593312] [2019-10-13 21:10:40,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:40,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:40,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:40,272 INFO L87 Difference]: Start difference. First operand 1208 states and 1916 transitions. Second operand 4 states. [2019-10-13 21:10:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:40,440 INFO L93 Difference]: Finished difference Result 2377 states and 3794 transitions. [2019-10-13 21:10:40,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:40,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-10-13 21:10:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:40,450 INFO L225 Difference]: With dead ends: 2377 [2019-10-13 21:10:40,450 INFO L226 Difference]: Without dead ends: 1208 [2019-10-13 21:10:40,457 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:40,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2019-10-13 21:10:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1208. [2019-10-13 21:10:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2019-10-13 21:10:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1911 transitions. [2019-10-13 21:10:40,505 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1911 transitions. Word has length 175 [2019-10-13 21:10:40,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:40,505 INFO L462 AbstractCegarLoop]: Abstraction has 1208 states and 1911 transitions. [2019-10-13 21:10:40,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:40,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1911 transitions. [2019-10-13 21:10:40,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:10:40,511 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:40,512 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:40,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:40,720 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:40,721 INFO L82 PathProgramCache]: Analyzing trace with hash -7456040, now seen corresponding path program 1 times [2019-10-13 21:10:40,721 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:40,721 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153804927] [2019-10-13 21:10:40,721 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:40,721 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:40,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:10:40,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153804927] [2019-10-13 21:10:40,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145236601] [2019-10-13 21:10:40,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:41,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 3300 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:41,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:41,807 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:42,116 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:42,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:10:42,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333563837] [2019-10-13 21:10:42,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:42,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:42,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:42,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:42,118 INFO L87 Difference]: Start difference. First operand 1208 states and 1911 transitions. Second operand 4 states. [2019-10-13 21:10:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:42,338 INFO L93 Difference]: Finished difference Result 2413 states and 3842 transitions. [2019-10-13 21:10:42,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:42,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-13 21:10:42,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:42,348 INFO L225 Difference]: With dead ends: 2413 [2019-10-13 21:10:42,349 INFO L226 Difference]: Without dead ends: 1250 [2019-10-13 21:10:42,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:42,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2019-10-13 21:10:42,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1247. [2019-10-13 21:10:42,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1247 states. [2019-10-13 21:10:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1974 transitions. [2019-10-13 21:10:42,399 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1974 transitions. Word has length 178 [2019-10-13 21:10:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:42,400 INFO L462 AbstractCegarLoop]: Abstraction has 1247 states and 1974 transitions. [2019-10-13 21:10:42,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1974 transitions. [2019-10-13 21:10:42,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:10:42,405 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:42,405 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:42,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:42,614 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash 623832664, now seen corresponding path program 1 times [2019-10-13 21:10:42,615 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:42,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639521423] [2019-10-13 21:10:42,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:42,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:42,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:42,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639521423] [2019-10-13 21:10:42,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416230841] [2019-10-13 21:10:42,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:43,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:43,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:43,665 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:44,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:10:44,338 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:44,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:44,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643311840] [2019-10-13 21:10:44,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:44,342 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:44,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:44,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:44,344 INFO L87 Difference]: Start difference. First operand 1247 states and 1974 transitions. Second operand 9 states. [2019-10-13 21:10:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:44,585 INFO L93 Difference]: Finished difference Result 2418 states and 3847 transitions. [2019-10-13 21:10:44,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:44,585 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-13 21:10:44,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:44,594 INFO L225 Difference]: With dead ends: 2418 [2019-10-13 21:10:44,594 INFO L226 Difference]: Without dead ends: 1258 [2019-10-13 21:10:44,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 341 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2019-10-13 21:10:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1249. [2019-10-13 21:10:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1249 states. [2019-10-13 21:10:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1978 transitions. [2019-10-13 21:10:44,642 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1978 transitions. Word has length 178 [2019-10-13 21:10:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:44,642 INFO L462 AbstractCegarLoop]: Abstraction has 1249 states and 1978 transitions. [2019-10-13 21:10:44,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1978 transitions. [2019-10-13 21:10:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:10:44,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:44,648 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:44,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:44,853 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:44,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1793865737, now seen corresponding path program 1 times [2019-10-13 21:10:44,854 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:44,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349612245] [2019-10-13 21:10:44,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:44,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:44,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:44,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349612245] [2019-10-13 21:10:44,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545903523] [2019-10-13 21:10:44,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:45,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 3295 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:45,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:45,854 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:46,250 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:46,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:46,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103181491] [2019-10-13 21:10:46,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:46,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:46,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:46,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:46,252 INFO L87 Difference]: Start difference. First operand 1249 states and 1978 transitions. Second operand 11 states. [2019-10-13 21:10:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:46,436 INFO L93 Difference]: Finished difference Result 2354 states and 3747 transitions. [2019-10-13 21:10:46,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:46,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 178 [2019-10-13 21:10:46,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:46,446 INFO L225 Difference]: With dead ends: 2354 [2019-10-13 21:10:46,446 INFO L226 Difference]: Without dead ends: 1266 [2019-10-13 21:10:46,451 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 347 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2019-10-13 21:10:46,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1256. [2019-10-13 21:10:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1256 states. [2019-10-13 21:10:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1988 transitions. [2019-10-13 21:10:46,494 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1988 transitions. Word has length 178 [2019-10-13 21:10:46,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:46,495 INFO L462 AbstractCegarLoop]: Abstraction has 1256 states and 1988 transitions. [2019-10-13 21:10:46,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:46,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1988 transitions. [2019-10-13 21:10:46,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:10:46,501 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:46,501 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:46,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:46,710 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:46,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:46,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1490382265, now seen corresponding path program 1 times [2019-10-13 21:10:46,711 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:46,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008823223] [2019-10-13 21:10:46,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:46,712 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:46,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:46,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008823223] [2019-10-13 21:10:46,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482790591] [2019-10-13 21:10:46,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:47,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:47,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:47,766 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:48,183 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:48,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:48,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565325368] [2019-10-13 21:10:48,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:48,184 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:48,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:48,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:48,184 INFO L87 Difference]: Start difference. First operand 1256 states and 1988 transitions. Second operand 8 states. [2019-10-13 21:10:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:48,304 INFO L93 Difference]: Finished difference Result 2358 states and 3756 transitions. [2019-10-13 21:10:48,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:48,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 179 [2019-10-13 21:10:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:48,313 INFO L225 Difference]: With dead ends: 2358 [2019-10-13 21:10:48,313 INFO L226 Difference]: Without dead ends: 1270 [2019-10-13 21:10:48,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 349 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2019-10-13 21:10:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1263. [2019-10-13 21:10:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1263 states. [2019-10-13 21:10:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1999 transitions. [2019-10-13 21:10:48,362 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1999 transitions. Word has length 179 [2019-10-13 21:10:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:48,363 INFO L462 AbstractCegarLoop]: Abstraction has 1263 states and 1999 transitions. [2019-10-13 21:10:48,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1999 transitions. [2019-10-13 21:10:48,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:10:48,369 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:48,370 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:48,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:48,578 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:48,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:48,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1285601894, now seen corresponding path program 1 times [2019-10-13 21:10:48,578 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:48,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624292863] [2019-10-13 21:10:48,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:48,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:48,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:48,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624292863] [2019-10-13 21:10:48,690 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930029642] [2019-10-13 21:10:48,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:49,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:49,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:49,508 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:49,765 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:49,765 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:49,765 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886833328] [2019-10-13 21:10:49,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:49,766 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:49,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:49,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:49,766 INFO L87 Difference]: Start difference. First operand 1263 states and 1999 transitions. Second operand 4 states. [2019-10-13 21:10:49,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:49,976 INFO L93 Difference]: Finished difference Result 2445 states and 3890 transitions. [2019-10-13 21:10:49,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:49,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2019-10-13 21:10:49,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:49,986 INFO L225 Difference]: With dead ends: 2445 [2019-10-13 21:10:49,986 INFO L226 Difference]: Without dead ends: 1263 [2019-10-13 21:10:49,997 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2019-10-13 21:10:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1263. [2019-10-13 21:10:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1263 states. [2019-10-13 21:10:50,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1994 transitions. [2019-10-13 21:10:50,042 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1994 transitions. Word has length 179 [2019-10-13 21:10:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:50,042 INFO L462 AbstractCegarLoop]: Abstraction has 1263 states and 1994 transitions. [2019-10-13 21:10:50,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:50,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1994 transitions. [2019-10-13 21:10:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:10:50,048 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:50,049 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2019-10-13 21:10:50,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:50,257 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:50,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1483053625, now seen corresponding path program 1 times [2019-10-13 21:10:50,258 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:50,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305391934] [2019-10-13 21:10:50,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:50,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:50,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:10:50,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305391934] [2019-10-13 21:10:50,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853762210] [2019-10-13 21:10:50,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:51,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 3292 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:51,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:10:51,326 INFO L321 TraceCheckSpWp]: Computing backward predicates...